Cell Transportation Lab

Osmosis

Introduction

This lab was designed to help understand what happens with cells and the different solutions they might be living in. The several different solutions were used to show how the membrane would react and what would happen overall to the cell. The control variables were the cup, amount of solution(in and around the cell), the membrane simulator, and the amount of time the cells soaked. The independent variables were the type of solution the cells were submerged in. The dependent variables were how the mass of the cell changed, if at all, in the different solutions.

Hypothesis

If the solutes in the Cell were different in amount than those in the solution, then the cell will react by swelling or shriveling. If the solutes in the cell and in the solution are equal than the cell wont do anything as it has reached homeostasis.

Materials

3 dialysis tubes

3 cups

Funnel

Graduated Cylinder

3 Solutions (200mL of each)

Balance

String

Drinking water (20mL for each tube)

Step for Completing the Lab

1) Gather Materials

2) Tie one end of the dialysis tube tightly with string

3) Place the funnel into the other/open end of the tube

4) Pour 20mL of drinking water into the tube

5) Tie the open end of the tube tightly with string

6) Repeat steps 2-5 two more times

7) Measure the mass of each filled tube with the balance and record your data in a table

8) Pour 200mL of each of your 3 solutions into cups (different solution in each cup)

9) Submerge a dialysis tube in each solution

10) Wait 24 hours then remove the tubes from the solutions, dry them off, and reweigh them

11) Record your data and create a conclusion

Results

Big image

Conclusion

If the solutes in the Cell were different in amount than those in the solution, then the cell will react by swelling or shriveling. If the solutes in the cell and in the solution are equal than the cell wont do anything as it has reached homeostasis.


In the Lab, the data showed a decrease in the amount of drinking water that was in the tube which shows the solution it was soaking in had a higher number of solutes than the water inside the dialysis tube. Some solutions showed more of a change than others as expected.


i found that in a hyper tonic solution, which all 3 of these proved to be, the water in a cell will move out into the solution surrounding it in order to attempt to reach homeostasis which it needs to survive. None of the solutions were hypotonic or isotonic.