Download Cell transport gallery walk

Station A
1. Does permeable mean: able to pass through or NOT able to pass through?
2. Does impermeable mean: able to pass through or NOT able to pass through?
Look at the following U-tube below. The two sides of the tube are separated by a selectively permeable
membrane, such as dialysis tubing. The membrane is permeable to water and to the simple sugars, glucose
and fructose. The membrane is completely impermeable to the larger carbohydrate, starch.
L
Water,
glucose,
&
fructose
3. Can the fructose move? ___
4. Can the glucose move? ___
5. Can the starch move? ___
R
Water,
glucose,
fructose,
& starch
Station B
The illustration shown is a cell model with starch solutions both inside and outside the cell.
Label the % of water inside and outside of each model given. The % shown refers to the solute
6. Outside - _____
7. Inside - _____
16. Circle the situation
where water will move out
of the cell.
17. How do you know?
8. Outside - _____
9. Inside - _____
10.Outside - _____
11.Inside - _____
18. Put a star by the
situation where the solution
rise the highest in the tube.
(water going IN)
Station C
Joseph designed an experiment to determine the amount of solute contained in an
egg. First he soaked the eggs in vinegar to dissolve their shells, leaving on the
membrane. Next, three eggs were massed and placed in syrup solutions of 30%,
60%, and 90% concentration, while the remaining egg was placed in distilled water and
left to sit overnight. The next class period he massed the eggs a final time. His results
are summarized in the data table shown.
12. Calculate the change in mass for each egg. Be sure to indicate if mass was lost or gained.
Put this table in your notebook:
Egg #
1
Change In
mass (g)
2
3
13. At what percent (estimate) is the egg isotonic to syrup solution? Explain.
4
Station D
14. Which statement below is always true in living things
a. Water always moves from higher/greater to lower/lesser
concentrations.
b. Water always moves from lower/lesser to higher/greater
concentrations.
c. Neither statement is always true.
15. Where is the water percentage the higher: beaker or cell?
16. Which way will the water move: into or out of the cell?
17. Therefore, will the cell get larger, increasing in mass or will it shrink,
decreasing in mass? __________
Station E
Solution A
Solution B
Solvent
Solvent
Solute
Solute
__________
__________
18. If you were comparing the two solutions above, which would be
hypertonic and which would be hypotonic? Label accordingly.
19. If water could move between the two solutions (but not the solute),
water would move from ______ to _____.
Station F
Often concentrations of solutions are expressed is M. This is a unit (molar) that just tells you
how concentrated the solution is with solute.
20.Which sucrose solution has the highest concentration of sucrose in it (so the least water)?
Put a star over the one that has the least sucrose in it (so the most water)?
0.8 M
0.6 M
0.4 M
0.2 M
0M
Five dialysis bags (A – B – C – D – E) were filled with various concentrations of sucrose and
then placed in separate beakers containing an INITIAL concentration of 0.6 M sucrose solution.
The bags were impermeable to sucrose. At 10-minute intervals, the bags were massed and
the percent change in mass of each bag was graphed.
21. Which bag gained the most water? __________
22. If that bag gained water, what type of solution must it have been in (hypertonic, hypotonic,
isotonic)?
23. Which bag lost the most water? ____________
24. If that bag lost water, what type of solution must it have been in (hypertonic, hypotonic,
isotonic)?
Station G
Show that you understand what is happening in each picture as molecules move in and out cells by match the
diagrams to their type of molecular transport. Make sure that you choose the most specific answer. NOTICE
which way the arrows are pointing (indicate movement).
a. osmosis
d. phagocytosis
b. pinocytosis
e. facilitated diffusion
c. diffusion
f. active transport
25.__________
26.___________
27.__________
28.__________
29.__________
30. __________
Station H
31. Where are there more solute molecules in the cell (extracellular fluid or cytoplasm)?
________________
32. Which way are the solute molecules moving (into or out of) the cell?
___________________
33. Is this an example of passive or active transport? ______________________
34. Does it require ATP? ____________________
Station I
The diagram shows two different kinds of substances, A and B, entering a cell.
35. Does ATP have to be used to move either substance into the cell? _____
36. If so, which substance? __________________ Why?
37. When a cell does need energy, which of its organelles produces it for the cell? _________________
Station J
Describe the solutions these red blood cells must have been put in for them to now look this way. Include
how you know.
38.
39.
40.
Station K
What types of solutions have these cells been placed in? How do you know?
41.
42.
43.
44.
Station L
45. Where are the minerals the most concentrated? ______
46. Which way are they moving? _________________
47. How can that occur?(explain)
Station M
This is a picture of a paramecium. They live in fresh water but have a high solute concentration
inside.
48. Osmosis means water goes from high concentrations of water to low concentrations of
water. In what direction will the water go?
49. Why is the contractile vacuole important to this organism? Explain.