Oxygen Essay Examples

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Respiratory System - Muscular system Essay

330 words - 2 pages The respiratory system is oxygen inhaled into the body and oxygen exhaled from the body. The oxygen is carried throughout all the body systems by blood through the blood vessels. The blood is then pumped by the heart. When a person is resting the blood pumps 5 liters of blood, when the person is exercising the heart pumps 7 times the amount of blood.The amount of air you breathe depends on how active you are. When you start to move around and exercise the muscles in your body send messages to your brain telling you that they need more oxygen. Your brain will then send signals to your muscles that control breathing so they can relax and you take fewer breaths and you can get less tired VIEW DOCUMENT
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Lactic Acid Essay

1003 words - 5 pages is just that; a build up in the electron transport chain. "The body has a limited store of about 85g of ATP and would use it up very fast if we were unable to resynthesis. As we exercise pyruvate is formed. When insufficient oxygen is available to breakdown the pyruvate then lactate is produced. Lactate enters the surrounding muscle cells, tissue and blood. The muscle cells and tissues receiving the lactate either breakdown the lactate to fuel (ATP) for immediate use or use it in the creation of glycogen. The glycogen then remains in the cells until energy is required. 65% of lactic acid is converted to carbon dioxide and water, 20% into glycogen, 10% into protein and 5% into glucose VIEW DOCUMENT
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The dangers of non-metals to the environment

376 words - 2 pages Among the most harmful and dangerous non-metal compunds are nitrogen oxides, sulphur dioxide, carbon dioxide, carbon monoxide, and hydrogen sulphide. These can cause devastating effects to human beings, plants, animals and the environment. Matals are generaly less harmful, although lead is extremely toxic.Hydrogen sulphide is a highly toxic gas. It has a very bad smell, often identified in rotten eggs and stink bombs. Hydrogen sulphide interferes with cellular respiration. If inhaled, Hydrogen Sulphide combines with haemoglobin in the bodies of human beings and other mammals. haemoglobin is the substance in blood which carries oxygen to tissues. In combining with the haemoglobin, hydrogen VIEW DOCUMENT
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Enzyme Action Essay

1557 words - 7 pages 1.Problem / PurposeThe purpose of this experiment is to investigate the properties of an enzyme - substrate reaction2.HypothesisHydrogen peroxide is a very reactive compound that can be used for a variety of reactions including bleaching and disinfecting minor wounds. Acting as an oxidizing agent, it is also toxic to cells, hence its value as a disinfecting agent that disrupts the metabolism of bacteria. Our body cells and those of many other animals contain an enzyme called catalase that accelerates the conversion of toxic hydrogen peroxide to water and oxygen gas.In this experiment, if the concentration of the enzyme is increased, then the reaction will proceed faster and if the VIEW DOCUMENT
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Homeostasis Essay

485 words - 2 pages level of activity is affected by environmental factors. The heart rate slows and cardiac output falls when demands on bodily systems are less are in a secure and non-threatening environment. When demands are high on bodily systems, the heart rate is high.Breathing is essential to life: it allows oxygen to be taken in, carbon dioxide to be given off, and blood to be regulated. Processing food within cells in order to obtain the energy needed for a wide range of cellular activities is dependent on a continuous supply of oxygen to the cells. The respiratory system takes in oxygen and excretes carbon dioxide. Homeostasis allows the respiratory system to take in oxygen in many different VIEW DOCUMENT
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"Respiration is very similar to burning." Is this true? Illustrate your answer by describing 3 similarities and 3 differences between the two

603 words - 3 pages Respiration is a process which releases energy from energy-rich molecules such as glucose. The glucose is converted into energy which is usable for life processes. Burning, or combustion, is a reaction between a substance and a gas to release energy. These two reactions have many similarities but are not the same. This essay will identify some of similarities and differences between the two processes.The first similarity is that both respiration and burning use oxidation to release energy. In respiration, oxygen combines with glucose to release energy which can be used in the body. Also some heat is produced to keep the body warm. Burning normally occurs in oxygen (in form of O2) to form VIEW DOCUMENT
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The Rate Of Photosynthesis Essay

3760 words - 16 pages Anas Ahmed 10JCBiology Controlled Assessment- Investigating the rate of photosynthesisAll living things require energy to carry out their life processes. The green plants obtain their energy from sunlight for their life processes. They capture the solar energy and then convert it into a chemical energy. Photosynthesis is an important process , to plants, because they produce glucose and they use the glucose to produce other important and useful chemicals such as fats, proteins and vitamins. The oxygen released as a by-product, vital to respiration in plants and animals. Therefore, photosynthesis can be considered the ultimate source of energy for life and for nearly all plants and animals VIEW DOCUMENT
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A Mass Spectrometer Inlet System For Sampling Gases Dissolved In Liquid Phases

4128 words - 17 pages gases, among which are oxygen, carbon dioxide, nitrogen, hydrogen, nitrous oxide, nitrogen dioxide, methane, carbon monoxide, and others. The introduction of manometric methods to the study of the reactions in which a gas is either a product or a reactant has greatly facilitated the investigation of these processes. Measure- ment of pressure differences alone cannot, however, tell what gas (or gases) is changing concentration in a system. Separate methods must be employed to this end. Indeed, in a complex system, the usefulness of manom- etry is severely limited. The manometer is also an inherently slow instrument, chiefly because of the intrinsic nature of biological reactions, the VIEW DOCUMENT
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Fire Essay

422 words - 2 pages The scientific name for burning is "combustion." In most cases oxygen from the air combines with some material that can burn. This produces heat. If the process takes place rapidly, we may see flames or an intense glow which is called fire.Chemically during combustion, two atoms of oxygen from the air combine with one atom of carbon from the fuel to form carbon dioxide.How Fires Get Extinguished?An understanding of how fires burn is essential if a fire is to be extinguished. The three (3) major elements of fire are: a) air; b) heat; and, c) fuel. All three of these elements inter-react to create a fire. If the reaction linking the elements is interrupted, the fire will be extinguished.The VIEW DOCUMENT
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Terminology Used In Chemistry Essay

517 words - 3 pages metallic character decreases (non-metallic) character decreases down the group.Atomic radius: going down the group the atomic radius increases because the atomic radius decreases along the period from left to rite.Reactivity: going down the group 1 the reactivity of the elements increases while going down the group 7. The reactivity of the elements decreases.Redox reaction: reduction and oxidation reactions are known as redox reactions because they take place simultaneously (at the same time).Reduction (redactant): is the removal of oxygen from a substance, the addition of hydrogen to a substance, the addition of electrons to a substance.Oxidizing agent: is a substance which adds oxygen from VIEW DOCUMENT
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The Effects Of Exercise On The Pulmonary Ventilation Rate

910 words - 4 pages Respiration is the process that takes place in every living cell to make energy available to the body. Energy is vital for us to carry out many life processes such as movement and so respiration in essential to life. During respiration glucose and oxygen are used in a reaction that produces energy and gives out carbon dioxide and water as waste products. Glucose is obtained by digestion of food and oxygen is taken from the air during a process called breathing or ventilation. Pulmonary Ventilation is the term given to the movement of air in and out of the lungs; the rate of pulmonary ventilation is defined as the tidal volume multiplied by the number of breaths taken per minute. Tidal VIEW DOCUMENT
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Bio 207 "animal physiology"

495 words - 2 pages of the tube doubles the blood flow is decrease by a factor of 2-If the viscosity increases the blood flow will decrease-Gas exchange: unlike animals that are very small, air diffuses from outside to the inside, however, for us (humans) this is imposible because of our large size. So to get the oxygen to the tissue, we increase surface area to volume ratio-Breathing in the air is different in breathing in the water because:-Water has less oxygen concentration in the water than it is in the air-Water has higher viscosity (resistance of flow) that make it hard to flow water through the gills so it makes it makes it energetically costly than breathing done in the air-Fish use gills to extract VIEW DOCUMENT
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Study Of Lung Capacity Of An Individual By Using Spirometer

2878 words - 12 pages Title : Study of lung capacity of an individual by using spirometerIntroduction :RespirationThe primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing. When we breathe, we inhale oxygen and exhale carbon dioxide. This exchange of gases is the respiratory system's means of getting oxygen to the blood.Respiration is achieved through the mouth, nose, trachea, lungs, and diaphragm. Oxygen enters the respiratory system through the mouth and the nose. The oxygen then passes through the larynx (where speech sounds are produced) and the trachea which is a tube VIEW DOCUMENT
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Hypothermia, The Diving Reflex,And Survival

840 words - 4 pages ABSTRACTThis paper reviews the contributions of hypothermia and the mammalian diving reflex (MDR) to human survival of cold-water immersion incidents. It also examines the relationship between the victim's age and MDR and considers the protective role played by hypothermia. Hypothermia is the result of a reduced metabolic rate and lowered oxygen consumption by body tissues. Although hypothermia may produce fatal cardiac arrhythmias such as ventricular fibrillation, it is also associated with bradycardia and peripheral vasoconstriction, both of which enhance oxygen supply to the heart and brain. The MDR also causes bradycardia and reduced peripheral blood flow as well as laryngospasm, which VIEW DOCUMENT
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All about Iron

481 words - 2 pages Iron is one of the most common elements on earth; it is also one of the oldest metals and was first fashioned into useful and ornamental objects at least 3,500 years ago. Steel/Iron is quite a common building material and it's used for building things such as bridges, cars, pots, trains, fences and office supplies. Iron ore, also known as Hematite is found and mined in Brazil; it is then taken to blast furnaces located around the globe where the ore is mixed with carbon as carbon is more reactive than iron, so it can push out iron from iron dioxide with high temperatures to get rid of the oxygen, this Reaction, in which oxygen is removed is called a reduction reaction.Iron {Fe}Iron from the VIEW DOCUMENT
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How to make Slime

367 words - 2 pages guk, you can scrap extra from the sidesNow play! It may stain things, could get stuck in carpets, who knows?The Science:Elmer's glue is copolymer polyvinylalcohol, PVA, a plastic made from oilBorax is a natural mineral mined from the earth made of boron, sodium, oxygen and water.When you add water to elmer's glue the PVA, being unstable, starts to dissolve in the water.When you add the wet borax, it is slightly acidic, and it reacts with the PVA to crosslink.This crosslinking causes the guk to undergo an irreversible gelation reaction much like when an egg boils to become a hard boiled egg. It is safe to handle, but hey! let's not eat it...OK? VIEW DOCUMENT
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"Investigating The Distribution Of Streams Invertebrates"

3559 words - 15 pages into the net so that the species were washed in by the current;6) Then we put the species that were inside of the net into a white tray and identified the species and counted them;7) At each sample site we also measured:a) Temperature by putting a thermometer in the water until it stabilised, then we recorded it;b) Dissolved Oxygen by using a probe which we stirred, for about 30 seconds, in the water encouraging the water to move, then we recorded it;c) pH by using a pH meter which was put in the water, then we recorded it;d) Depth of water by using a metal measuring tape, then we recorded it;e) Velocity by using a probe that we put in VIEW DOCUMENT
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Discusses Descartes' Statement Cogito Ergo Sum (I Think Therefore I Am)

1240 words - 5 pages . Now to expand this theory, I believe that anything that can cause ripples in an environment exists. Consequently, most anything that we can perceive (and even more that we can't) exist. Furthermore, just because a thing doesn't think (for example: rocks, terra, tomatoes, ants) doesn't mean it doesn't exist, or that it isn't.My belief also goes for the lack of an existence. For instance, if all the oxygen were to suddenly and instantaneously transport to a different place then a huge vacuum would form in the previous location of all the oxygen. The sudden appearance of oxygen would crowd up the new location and may even force out something else that also exists because that movement also VIEW DOCUMENT
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Evolution From A Molecular Perspective

3352 words - 14 pages evolutionism, can exist symbiotically due to the fact that both views have very good points.Hemoglobin: Comparisons between speciesOf all the proteins in living things, hemoglobin is 'the second most interesting substance in the world,' as American biochemist L. J. Henderson once stated (Hemoglobin, 4). However bold this statement seems, it must be realized that hemoglobin is, at least in the scientific world, by far the most studied and most discussed substance in the human body, as well as in other living organisms. Hemoglobin is the carrier in blood that transports oxygen to our tissues and carbon dioxide out of our body, changing colors as it does so. Hence, hemoglobin has long been VIEW DOCUMENT
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I Had To Join

543 words - 3 pages Hydrogen makes up seventy-five percent of the earth's mass.Hydrogen is usually found on earth in combination with oxygen, carbon, and nitrogen. To be used it must be separated from these.Hydrogen is a very safe element when used as an energy source, it emits nothing into the air but water. It also has more uses then electricity. Hydrogen is primarily used in manufacturing ammonia, petroleum refining, hydrogen peroxide, and in the synthesis of methanol. It is also used to retrieve metals from their compounds because it is a good reducing agent. It can also be used in space shuttles for fuel, to provide heat, electricity, and drinking water.In the near future hydrogen may be VIEW DOCUMENT
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In This Unit I Have Learned A Lot About Creation

649 words - 3 pages different kinds of Evolution. Chemical Evolution, Cosmic Evolution, Geological Evolution, and Micro and Macroevolution. Those last two I already talked about. The theory of Chemical Evolution is that we all came from amino acids. They did an experiment about it, proving their theory right. But there were some problems. In the experiment it had a lack of oxygen because it wouldn't work when oxygen was present, so they think that it happened underwater. That doesn't work either. There are two different types of amino acids, right and left handed ones. Right-handed ones are deadly, but left-handed ones are the ones we all have. But, in his experiment, they came out fifty percent right-handed, and VIEW DOCUMENT
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Lewis Acids And Bases

380 words - 2 pages acid and trimethylamine is Lewis base. A curved arrow originates from nitrogen atom and point to hydrogen atom. The initial product of the acid-base reaction is trimethylnitronium chloride.In the below example number two, aluminum chloride is Lewis acid and dimethyl ether is Lewis base. A curved arrow originates from oxygen atom and point to aluminum atom. The initial product of the acid-base reaction is aluminum dimethyl ether chloride.(1)(CH3)3N + HCl→(CH3)3N+H + Cl-(2)AlCl3 + CH3OCH3→Al-Cl3O+(CH3)2ReferencesWikipedia, the free encyclopedia. Lewis Acid.http://en.wikipedia.org/wiki/Lewis_acidWikipedia, the free encyclopedia. Lewis base.http://en.wikipedia.org/wiki/Lewis_base VIEW DOCUMENT
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jgbhj

441 words - 2 pages 6. Quartz- Quartz has been known since pre-historic times. Quartz is the most common mineral found on the surface of the earth. It's found on many types of igneous, metamorphic, and sedimentary rocks. This natural form of silicon dioxide is found in a wide range of colors and varieties. http://www.mindat.org/min-3337.html7. Coal- Coal is a sedimentary rock found deep in the earth. It is composed mainly of carbon, hydrogen, and oxygen. It forms from buildup of organic matter, found along the edges of shallow seas, lakes, or rivers. Flat swampy areas that are episodically flooded are the best candidates for coal formation. http://www.worldcoal.org/coal/8. Mercury- the chemical formula for VIEW DOCUMENT
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Gone Fishin' ("The Fish" By Elizabeth Bishop)

971 words - 4 pages ' analogy can refer to the fish's age. Although faded and aged he withstood the test of time, like the wallpaper. Bishop uses highly descriptive words like 'speckled' and 'infested' to create an even clearer mental picture. The word 'terrible' is used to describe oxygen, and this is ironic because oxygen is usually beneficial, but in the case of the fish it is detrimental. The use of 'terrible' allows the reader to visualize the fish gasping for breaths and fighting against the 'terrible oxygen,' permitting us to see the fish's predicament on his level. The word frightening does essentially the same thing in the next phrase, 'the frightening gills.' It creates a negative image of something VIEW DOCUMENT
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Biology - The Movement of Molecules

415 words - 2 pages cells that need them. Diffusion is also vital for getting oxygen into cells and carbon dioxide out of them, for example, in humans. Facilitated diffusion occurs when substances move down the concentration gradient by "carrier proteins" in the cell membrane.Osmosis is also a type of passive transport involving the diffusion of water molecules across a selectively permeable membrane. Water will move by diffusion from an area where there is more of it to an area where there is a less of it. This results in the movement of water from a dilute (less concentrated) solution to a stronger (more concentrated) solution. It is the way water enters and leaves a cell. Osmosis is a special case of the diffusion of water. Osmosis occurs when water diffuses across a semi permeable membrane. Semi-permeable membranes will let small molecules pass through it easily, but will hold back larger molecules like sucrose's. It acts as if it has tiny holes in it, too small for the larger molecules to squeeze through. VIEW DOCUMENT
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Nutrients: Fats, Proteins. Carbohydrates, Water, Vitamins & Minerals

506 words - 3 pages . Our body doesn't make certain amino acids (building blocks), and so we get these amino acids with our diet.Fats: fats are basic nutrients made up of carbon, hydrogen, and oxygen atoms. They are used for cells to properly function and maintenance of body temperature. The body does not make some fatty acids and again we look for our diet to supply these. Triglycerides make up 95% of our total body fat, and cholestetrol makes up the rest.Nutrients that supply metabolism:Minerals: Essential to metabolism. Found as salts, or ions like copper and iron. List of some Minerals•Chromium•Cobalt•Copper•Fluorine•Iodine•Iron•Manganese•Molybdenum•Selenium&bull VIEW DOCUMENT
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Land Degradation

460 words - 2 pages table.The only ways we can resolve this kind of land degradation is by being careful where we let chemicals from things like car washes, weed poisons and any other related source flow. Removing salt from the water, this helps to make the water usable by other plants. Water from the water table is absorbed, reducing the level of it back to normal. This can only be helped by planting one of a very few salt-tolerant trees, which help by:1. If we can do this, Soil erosion will hopefully be kept to a minimum and farmers would be able to make more profit and provide us with food. Without these leaves, photosynthesis can not occur, so the plants die. This excess of nutrients encourages algae to grow. er, to prevent further damage, and, years later, to try to replant crops. As salty water cannot be absorbed by plants, the plant runs out of water, so its leaves fall off. This algae uses up oxygen from the water, which kills other live such as fish living in the water. VIEW DOCUMENT
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Discuss The Xylem And Phloem. (Structure, Changes In The Xylem Of Woody Plants, Transport)

996 words - 4 pages transport of ions from the soil to the xylem in the center of the root. Osmosis is responsible for the water following, in result this builds up pressure in the xylem vessels. Since the endodermis keeps water from escaping back to the soil the water climbs up. Active transport in roots uses a considerable amount of energy so then; they need a nice supply of oxygen. When the soil is full of moisture and oxygen and it's rather humid out, guttation occurs. Guttation is when the leaves are close to the roots and the pressure is high in the roots; because of the humidity in the air, the water can't evaporate fast enough and water pokes out the tips of the leaves. (Aww, cute, it pokes out) Root pressure VIEW DOCUMENT
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Genetic Disorders

721 words - 3 pages normal amount of functional enzyme is sufficient to prevent lipid accumulation in the brain. In fact, heterozygous individuals produce equal numbers of normal and dysfunctional enzyme molecules. At the molecular level, the normal allele and the Tay-Sachs allele are codominant.Sickle-cell disease is caused by the substitution of a single amino acid in the hemoglobin protein of red blood cells. When the oxygen content of an affected individual's blood is low, the sickle-cell hemoglobin deforms the red cells to a sickle shape. Sickling of the cells, in turn, can lead to other symptoms. The multiple effects of a double dose of the sickle-cell allele exemplify pleiotropy, which is the ability of a VIEW DOCUMENT
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The Environmental Hazards Of Technology Includes Bibliography

1471 words - 6 pages and learn to use technology to help us now, there will be no world, as we know it for our grandchildren and their grandchildren to live and enjoy life in.Tropical rain forests are the most precious biological resource on earth. Although the rain forests account for less than seven percent of the total land surfaces on earth, they contain more than half of the world's plants, animal and insect species. One-fifth of the world's fresh water is located in the Amazon basin alone. Tropical rain forests are the "Lungs of our Planet." They absorb more carbon dioxide, recycling the gases into oxygen, therefore reducing the negative impacts on our world. In the areas of the rain forests, it is VIEW DOCUMENT
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Air Pollution

1514 words - 7 pages atmosphere. Trees play an important role in producing oxygen from carbon dioxide. "A 115 year old Beech tree exposes about 200,000 leaves with a total surface to 1200 square meters. During the course of one sunny day such a tree inhales 9,400 liters of carbon dioxide to produce 12 kilograms of carbohydrate, thus liberating 9,400 liters of oxygen. Through this mechanism about 45,000 liters of air are regenerated which is sufficient for the respiration of 2 to 3 people". This process is called photosynthesis which all plants go though but some yield more and some less oxygen. As long as no more wood is burnt than is reproduced by the forests, no change in atmospheric CO2 concentration will VIEW DOCUMENT
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AP Biology Enzyme Synthesis Lab Report

1498 words - 6 pages Enzyme Catalysis 牋牋牋牋Introduction and Overview- In this lab, we will observe the conversion of hydrogen peroxide (H2O2) into water and oxygen gas. An enzyme known as catalase facilitates this conversion reaction. The catalase enzyme acts as catalysis, helping lower the energy needed to activate the reaction while the enzyme itself is not affected. The reaction could take place without the help of catalase, but it would happen a lot more slowly because more energy is needed for the reaction.牋牋牋牋The substance being acted on by the enzyme is known as the substrate, and in this case is hydrogen peroxide. The enzyme changes these substrates VIEW DOCUMENT
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Life-Span Development Chap 4 Notes

951 words - 4 pages - Genital Herpes - only if mother is active during delivery and baby comes in contact with sores; can cause blindness and other complications (1/3 die and 1/4 brain damage)- AIDS/HIV+.....1/3 babies born to HIV+ mothers become infectedIII.BirthA.Three stages1. Uterine contractions and dilation of cervix (baby moves into bith canal)2. Baby passes through birth canal3. Afterbirth - detachment and expulsion of the placentaB.Complications1. Precipitate - move through birth canal too rapidly/2. Anoxia - move through birth canal too slowly (insufficient supply of oxygen to the infant)3. Breech position (respiratory problems)4. Cesarean Section (safer than breech deliveries)* higher infection rate VIEW DOCUMENT
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Moon Exploration, The Apollo Program

756 words - 4 pages was developed from the work oftwo other programs, the Mercury and Gemini Programs.The actual spacecraft was made of the combinedCommand Module and the Service Module also calledthe CSM. It was 34ft. long and 10ft. in diameter at theend. It had a major advantage with its internal guidencesystem, that was developed by The MassachusettsInstitute of Technology.The CSM was made of two parts. The crew stayed inthe Command Module, which had some couches andwas pressurized with oxygen.Behind the CM was the SM or Service Module whichhad the main engine, which had 21,500lb. of thrust.The reaction control system , oxygen, fuel cells,hydrogen tanks, and envirnmental control systems. Themain engine was VIEW DOCUMENT
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Waste

555 words - 3 pages another problem. Currently, the primary method of disposal involves separating the water from the sewage, treating the sewage in mechanized treatment plants and disposing it into the nearest large body of water. With moderate population levels, large bodies of water can generally absorb the waste, using many of the present nutrients without harmful effect. However, with the high densities and populations of our modern cities, the dumping of sewage, even treated sewage, has created serious damage to local bodies of water. Inordinate amounts of harmful bacteria and oxygen depletion, created by the sewage erode water quality and destroy much of the aquatic life in these areas.Waste disposal must be VIEW DOCUMENT
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Crayfish, The A Complete Classification, Habitat, Predator And Prey, Body Plan, Nervous System, Circulatory System, Digestive System, And Respiratory System

654 words - 3 pages heart.Digestive SystemThe maxillae pass the pieces of food into the mouth. The food travels down the short esophagus into the stomach. The digestive gland produces digestive substances and from which the absorption of nutrients occurs. The green glands (also called antennal glands because they have ducts which exit near the base of the second antennae) function in excretion and osmoregulation. Undigested material passes into the intestine. The intestine is attached to the lobed stomach. The undigested material is exiled from the anus.Respiratory SystemThe gills are feather-like structures found underneath the carapace and attached to the chelipeds and walking legs. There is a constant flow of blood to the gills releases carbon dioxide and picks up oxygen. VIEW DOCUMENT
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Abortion (con)

547 words - 3 pages fertilizes an egg. Food and oxygen pass from the mother's bloodstream to the fetus by means of the Placenta. After two months, the fetus is about 1 inch long and can move its head, mouth, arms, and legs and has a heartbeat. The fetus has recognizable features after three months. This is around the time when the abortion takes place. If the fetus is not alive, why can it do almost all the things like a born baby.A woman walks into an abortion clinic one day and has a partial birth abortion. She walks out a few hours later, child-ridden, drugged up on pain killers, and maybe a little tired. The baby was killed and disposed of. Meanwhile, another female stabbed her grandmother to death because she VIEW DOCUMENT
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Responses Of Australian Ectothermic And Endothermic Organisms To Changes In Ambient Temperature

699 words - 3 pages exposing as much as possible of its body surface to the warmth of the sun. They do this by changing the shape of their body; a flattened body exposes a greater surface area to the sun. Snakes increase the blood flow in vessels close to the skin as they bask in the sun so more heat is absorbed and transported to inner body tissues and organs. Snakes are usually active during the day however if temperatures are too high they become nocturnal and their active period is at night. They also seek shade to prevent overheating.Snakes tend to be sluggish because their hearts are unable to pump sufficient blood to supply the oxygen needed for vigorous activity. Therefore snakes use anaerobic respiration during muscular activity.Snakes lose and gain heat in four ways:Evaporation - Wind increases heat lossConvectionRadiation - Heat gain by solar radiation, reflected solar radiation and Infa-red radiationConduction - Laying on warm groundThese adaptations assist the King Brown Snake in temperature regulation. VIEW DOCUMENT
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Heartless

536 words - 3 pages brings a hope in my heart that this injustice will one day end. I still keep the hope that the world will show integrity and stand up for us soon, and bring our misery to and end. I know that god is always with us, and will always be with us, and will never betray us nor forsake us. We will pursue victory over these enemies with every last drop of blood we possess. Death does not scare us. Conviction and faith are like the oxygen we need to breathe and keep alive. We will overcome Zionist injustice and persecution, one day very soon.bibliographies:I did it with my own imagination and with what is happening in the Gaza Strip VIEW DOCUMENT
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Acylation Lab

3045 words - 13 pages glassware could have accounted for some loss of product.Without recrystallization and melting point analysis, it was difficult to assess the purity of the product. If this had been measured, the main source of impurities would result from reactants exposure to moisture/atmosphere, which caused hydrolysis and introduction of chemicals to the reaction. In the case of acetic anhydride, had water been introduced, water would attack one of the oxygen double bonds, eventually go through an H3O+ work up, and introduce acetic acid in to the reaction. A similar hydrolysis would have taken place had aluminum chloride been exposed to moisture. Again, had the aqueous layer not have been separated fully VIEW DOCUMENT
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Chem Notes

698 words - 3 pages hydrogen is bonded to either nitrogen, oxygen or fluorine.Strongest intermolecular force but weaker than ionic, metallic and network bondsPolar substances dissolve in polar substances and non-polar substances dissolve in non-polar substances. A substance is polar when the atoms combined have different electronegativity and when they are un-bonded electron pairs that push on the covalent bonds.A substance's MP and BP is determined by the strength of the intermolecular forces. Stronger intermolecular forces mean the MP and BP are higher. Dispersion forces are the weakest, while hydrogen bonding is the strongest. VIEW DOCUMENT
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communication in home care

560 words - 3 pages divider. Call buzzers were rather loud and irritating if not turned off in timely fashion. On two separate occasions throughout the observation period, oxygen machines were used on residents sitting in the common area. This was identified as a significant barrier to communicating effectively for both staff and residents.There were several identified environmental barriers that could be addressed in order to provide effective and efficient communications among care providers and residents, but overall residents did not appear to be overly affected and there seemed to be ample space for independence. VIEW DOCUMENT
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Structure and Function of Carbohydrates

512 words - 3 pages DESCRIBE AND EXPLAIN THE STRUCTURE AND FUCTION OF CARBOHYDRATESCarbohydrates are part of what we call macronutrients. In our body, as well as proteins and fats, macronutrients are needed in large amounts. Carbohydrates can be monosaccharides (sugars), disaccharides, oligosaccharides and polysaccharides (starch). Carbohydrates have the general formula of Cx(H2O)y- they only contain carbon, hydrogen and oxygen- making them organic compounds.Sugar is a monosaccharide and is very sweet; it is made of alpha glucose monomers. If two of these were to polymerise in a condensation reaction, it would result in a disaccharide. The disaccharide formed would be maltose as it's made from an alpha glucose VIEW DOCUMENT
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The Birth And Death Of Stars

1221 words - 5 pages , fusion of heavier (carbon, oxygen, neon, etc.) elements. These elements fuse at an ever increasing pace. The Seeds book gives the example that a 25 solar-mass star will fuse its hydrogen in 7 million years, its oxygen in 6 months, and its silicon in one day. As the core converts to iron, it can no longer produce heavier nuclei, and the core collapses in a tenth of a second. The outward force of this collapse blasts the star apart causing a massive, bright, short-lived explosion called a supernova.If the remaining core's mass is between 1 1/2 to 3 solar-masses, it will collapse into a small, dense neutron star. If the star's remaining mass is greater than three solar-masses, the star contracts to become a black hole.Works Cited:Seeds, Michael A.. Horizons: Exploring the Universe. 7th ed. Brooks/Cole, 2002Lattanzio, Stephen, et al. Telecourse Student Guide for UNIVERSE The Infinite Frontier. 4th ed. Brooks/Cole, 2002 VIEW DOCUMENT
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Global WArming

3442 words - 14 pages The atmosphere is something that is around us everyday, but do we really think about the changes that occur in it. It isn't that we just aren't paying attention, but more of the fact that it is hard to notice slight changes over long periods of time. Everyday gases are released into the air by all living material. The gases in the air are used for many important things. For example, hydrogen is released by volcanoes, which can give energy to the cell; photosynthesis has evolved to take the gas carbon dioxide and create food and release oxygen; nitrogen is a gas used in our air, oceans, and solid earth, as an essential part of living things. Carbon dioxide is also involved in processes where VIEW DOCUMENT
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A Smokers Pleasure

1783 words - 8 pages fatal.The path smoke follows throughout a persons body is devastating to their health and well being. Smoking increases a persons risk for many different diseases or health problems, including, but not limited to, stroke, lung cancer, chronic lung disease, heart disease (Deaths Attributable to Cigarette Smoking), and emphysema.Around eighty-two thousand people die of heart disease every year (Deaths Attributable to Cigarette Smoking). This is because the carbon monoxide from smoke removes the oxygen from blood, causing cholesterol to deposit on the artery walls, and these deposits eventually lead to their hardening. The nicotine in smoke raises the smoker's blood pressure, and it causes the VIEW DOCUMENT
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Acid Rain

738 words - 3 pages processes and the burning of fossil fuels such as coal-fired power generators and ore smelting are the main culprits for the release of sulphur dioxide. Nitrogen oxide comes into the atmosphere in harmful amounts by the combustion of fuels in vehicles, furnaces (residential and industrial) and boilers. These are the main causes of acid rain.The formation of acid rain happens when acidic compounds, mainly SO and NO are released into the atmosphere. The wind then carries the acidic compounds, both wet and dry, across land and water. Sometimes hundreds of kilometres from where the acid was produced. With the help of sunlight the gases react in the atmosphere with water, oxygen and other chemicals VIEW DOCUMENT
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Which Human Activities Affected The Natural Environment Of The Amazon Basin?

857 words - 4 pages changes to the natural environment of the Amazon forest.The Amazonian climate changes because when huge amounts of trees are cut down, the Carbon dioxide - Oxygen balance will be tempered with. Because of more carbon dioxide than usual, the greenhouse effect comes into place and there are higher temperatures than usual. Because of the higher temperatures, there will be less evapotranspiration, and that leads to less rainfall. And not enough rainfall leads to drought, leading to parts of the forest merely dieing out. These high temperatures can affect the soil as well.When the temperature is higher as mentioned before, the humus layer on the bottom of the basin will decompose faster than it VIEW DOCUMENT
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Global Warming

863 words - 4 pages in other forms as well such as heat which is called infrared light. The Earth needs to absorb and reflect balanced amount of energy in order to have an inhabitable temperature. If too much energy leaves the earth, there is a possibility of another ice age but if too much energy stays that's Global Warming.The root cause of energy staying back on Earth is due to the atmosphere composition. A compound that plays a major role in causing this greenhouse effect is carbon dioxide. Carbon dioxide is one part carbon and two part oxygen and burning wood or gasoline in cars can cause release of this compound. The jumble of carbon dioxide and the atmosphere retains the infrared light as the carbon VIEW DOCUMENT
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Living With Or Alone

1313 words - 6 pages wasting away time and life is the so-called "Otaku" of our society, and they are created by living only with their parents and staying only in their room. When you live outside, on the other hand, your sociality is pushed towards improvement. The chances of seeing and living with strangers become abundant as you try out roommates, stay-overs and other kinds of interactions that require a free house. With that, you can see the lifestyles of different people and learn to adapt with them, thus upgrading your sociality. Without fresh oxygen your lungs grow old and die, that is the same with sociality, so it is considered healthy social-wise to be living with someone you are not VIEW DOCUMENT
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