Paper On Dialysis Tube Lab

710 words - 3 pages

Osmosis & Diffusion Lab - Dialysis TubingBackgroundThe movement of molecules through a cell membrane is termed osmosis or diffusion. Such movement is principally possible because nutritive molecules are smaller than membrane micropores. If the molecules are too large, no molecular transfer, or diffusion occur.Thus, some membranes may transmit selectively and are termed semi-permeable membranes. In the following experiment, cellophane dialysis tubing serves as an excellent representation of the cell membrane. The enclosed tube may, for the purpose of this experiment, be considered a single living cell in greatly enlarged form.MaterialsGlucose Solution, Starch Solution, Iodine Solution, Glucose Test Strips, Dialysis Tubing, String, 400 ml Beaker, 10 mL Graduated Cylinder, Scissors, RulerProcedureMeas ...view middle of the document...

Pour this into the tubing as well.Tie the second end of the tubing in an overhand knot and rinse it under the faucet. Set your "cell" on a clean surface.Fill the 400 ml beaker ¾ full with tap water. Add 10 drops of Iodine solution and stir well. (Iodine will turn blue-black in the presence of starch).Test the solution in the beaker for the presence of glucose by dipping a glucose test strip into it. After 30 seconds, compare the color on the strip to the color chart on the side of the bottle. Complete the Initial Status information on your data table.Place the artificial cell (the sealed tubing with solutions) into the beaker of solution and allow it to remain undisturbed for 15-20 minutes.Remove the tubing from the beaker and record your observations in the data table for final status of the solution and the bag.Retest the solution in the beaker and in the bag with a new glucose test strip and record this data in your table.Data Name __________________

Initial Contents

Initial Solution Color

Final Solution Color

Initial Presence of Glucose

Final Presence of Glucose

Bag

15 % Glucose & 1% Starch

Beaker

H2O + KI

Analysis of ResultsWhich substance(s) are entering the bag and which are leaving the bag?What experimental evidence supports your answer?Explain the results you obtained. Include he concentration differences and membrane pore size in your discussion.Quantitative data uses numbers to measure observed changes. How could this experiment be modified so that quantitative data could be collected to show that water diffused into the dialysis tubing?Based on your observations, rank the following by relative size, beginning with the smallest: glucose molecules, water molecules, KI molecules, membrane pores, and starch molecules.What results would you expect if the experiment started with glucose and KI solution inside the bag and only starch and water outside? Why?

RELATED

Effect on Solute Concentration in Dialysis Tubing After 30 Minutes - AP Biology - Lab Report

1662 words - 7 pages Effect on Solute Concentration in Dialysis Tubing After 30 Minutes Written By: Alexis Andino Date Written: September 10, 2018 Abstract The purpose of this lab was to discover how varying concentrations of sucrose in dialysis tubing affect the amount of distilled water entering the tubing when submerged in it. In the procedure, we measured the masses of five different concentration tubes before submerging the tubes into distilled water, waited

Levels Of Planning Assignment

1770 words - 8 pages Planning and organizing in respect to Wells Fargo is essential to the success of the company. The vision of Wells Fargo Bank is to move to the next stage going from "good to great," (wellsfargo.com). The organization has constantly reinvented itself through the years by creating new departments, products, services and new positions. The changes that have been made to the organization have been instrumental in the success of the company. Planning

Sun Life Case

7990 words - 32 pages Table of contents1: Summary 22: Main Contents of the report 3-202.1: Introduction 32.2: Problem and the followed procedure 42.3: Sun Life Financial from strategic managerial viewpoints 42.3.1: Sun Life Financial's strategic logic 62.3.2: SWOT analysis 102.3.3: PEST analysis 132.3.4: The attractiveness of the Chinese insurance market 172.3.5: Strategies and city choice 183: Results, conclusions and recommendations 224: Bibliography 231

This essay explains why it might be hard for parents to bring up children in the Christian faith

512 words - 3 pages In order to answer this question we must firstly look at what is done at the birth of the child. If they are baptised as a baby, they clearly include no opinion in the situation. If this child doesn't believe in this faith there will be obvious rise against this as they get older and realise what it means.Furthermore, a particularly social child who is busy quite a lot of the time may find it hard to go to Church when they are supposed to and

Vpost: Case Study

436 words - 2 pages V-post has the ability to substantially improve its profit margin, but it may difficult to realize that with the insight from Singpost, it can and will happen overnight. V-post is currently selling maximum range of approximately million bucks value of goods each day. As V-post faces many intense pressures to be more and more competitive and to increase profitability, a new perspective must be directed to the reduction and control of expenses

Bhopal Gas Tragedy Essay

1749 words - 7 pages Disasters happen when multinational corporations though having enormous resources tend to look the other side when most of the people are uneducated and their governments do not care for them and their safety and laws are usually bent if not broken by the corporations for their benefit.On the night at around 1 a.m. on Monday, December 3, 1984, when most of the people were at home sleeping, a deadly toxic methyl isocyanate (MIC) gas leaked out

Standardized Tests: Helpful Or Harmful?

2147 words - 9 pages Before entering the "real" world and making decisions about careers and life, there is one major decision one is faced with. The question of which institution will best fit their needs to prepare them for life. There are several choices to choose from. From Ivy League Schools to State Schools as well as Historically Black Colleges and Universities the list goes on and on. These schools are viewed in society on a scale. Ivy League Schools are

American History

371 words - 2 pages Throughout American history, the development of plantations (farms) in the American colonies arrived as immigrants arrived in small farms. The American people settled on the land west of the Mississippi for many diverse reasons. As the years went, by the profit and demand for crops such as tobacco grew larger. At that time, large plantation could had over 400 acres of fields growing anything from tobacco to maize and sugarcane(in the south), as

"Love In The Time Of Cholera" By Gabriel Garcia Marquez - Stylistic Analysis

815 words - 4 pages The author uses from the first person point of view. This is viewed in the first person because the author uses pronouns such as "we" and "my" in the story. To have pronouns such as "we" and "my" is the definition of first person narrators. An example of this can be seen through the following phrase:"My mother is not an inventive or convincing liar, and the excuses which occur to her are obviously second rate."We know that the narrator is

Albinism: Characteristics And Symptoms, Causes And Treatments

355 words - 2 pages Characteristics and symptomsThe characteristics and symptoms of albinism are:- very light skin color- blondish-white colored hair- visual impairments that require glasses- tendency to sunburn easily,- hearing impairments- blood-clotting problems- red/pink eyes- Low Vision- Sensitivity to bright light and glare- involuntary eye movements- "Slowness to see" in infancy- Inability of the eyes to work togetherThese are all symptoms of albinos but an

Contemplating Racism

1124 words - 5 pages From the beginning of recorded history, possibly before then, humans have found a necessity for classifying and categorizing every aspect of life. This need for order has been used to efficiently organize and clarify the endless details on Earth. This arrangement of objects in groups has also created a very sinister and volatile mindset that some people live by. This associative manner of classification has lead to the formation of beliefs in

Family Violence

2591 words - 11 pages Domestic Family Violence by definition consists of physical, emotional and psychological violence. Family Violence is prevalent among all domestic groups. This form of violence crosses ethnic, racial, age, national origin, sexual orientation, religious and socioeconomic lines. Those families at highest risk are those currently experiencing some complicating form of stress. This would include poverty, unemployment, low educational levels and

Analysis Of "Spirited Away" Directed By Hayao Miyazaki

5586 words - 23 pages The story of spirited away begins with Chihiro, the protagonist of the story moving to a new house in a country town. Initially Chihiro is stubborn and reluctant about leaving her friends and old life behind. Later on the family runs into what seems like an abandoned theme park, but is actually an entrance to a spirit world and more specifically a bathhouse for gods.When Chihiro is helpless of the circumstances of loosing her parents and the

Polaris Case Analysis

570 words - 3 pages PROBLEMAfter reviewing the facts of the article, it appears to me that the problem at Polaris is one of poor organization and structuring of the companies resources.ALTERNATIVESThe first alternative in solving the organizational problem at Polaris is to expand the marketing research and development teams to cities outside of the Midwest, such as Burlington, VT, Portland, ME, and Manchester, NH in the Northeast and Denver, CO, Helena, MT in the

What Was The Political Impact Of WW1 On Europe?

1064 words - 5 pages The first Total War also known as the 'bloodiest' war of the century, WWI proved to have a great impact upon all of Europe. Politically, there is a clear scene of what impact the War had on the main powers in Europe: for some countries, such as France and Britain, the change in regime was merely slight, in Germany rather significant, whereas in Russia it proved drastic and sparked off two revolutions. Hence, there were several common aspects of