Download HOMEOSTASIS TEST REVIEW SHEET

CP BIO MEMBRANE & HOMEOSTASIS TEST REVIEW SHEET
Chapter 6.2 & 6.3
NAME _________________________
1. Define “Diffusion” in your own words:
2. Define “Osmosis” in your own words:
3. Define HypotonicTurgidPlasmoptysis (aka “cytolysis”!)Contractile vacuole4. Define HypertonicFlaccidPlasmolysis5. Define IsotonicDynamic EquilibriumHomeostasis6. Semi-permeable (selectively permeable) means:
Examples of semi-permeable membranes (no need to write):
Dialysis Tubing
Raw egg without shell
Living Cell Membranes
Answer the following:
7. A steady state that means a cell will try to stay the same. The term for this is
____________________________.
8. When any molecule spreads out from high concentration to low, this is called
____________________________.
9. When water spreads out from greater to lesser, through a semi-permeable membrane,
this is called ____________________________.
10. Diffusion always goes from where there is ____________________________ to where there
is ____________________________.
11. Which moves faster: the molecules in hot water or cold water?
12. Name 2 ways that you could make diffusion go faster
_________________________________________________________________________.
13. Is diffusion ‘active’ or ‘passive’ transport? Does it need energy to work?
14. Is osmosis ‘active’ or ‘passive’ transport? Does it need energy to work?
15. Name the 3 environments of osmosis. ____________________________,
____________________________, ____________________________.
16. If the water is equal inside and outside of the cell, it is called ____________________________.
17. If there is more water inside the cell than outside, it is called ____________________________.
18. If more water outside the cell than inside, it is called ____________________________.
19. If an animal cell swells, what might happen? (big word) ____________________________
20. If a cell shrinks, what is this called? (big word) ____________________________
21. Firm, crispy plant cells are said to be __T__________________________, or have
_T___________________P___________________.
22. If a plant is limp, it is called ___F_________________________.
23. Drinking soda means that I am drinking a ________________ tonic solution, and it will cause
_____________________ to my cells.
24. A cell in distilled water (100% water) means that the cell is in __________________ tonic solution and
_______________________ could occur.
25. To stop the cell from bursting, the _________________________ vacuole would be pumping water out
of a cell.
26. The concentration numbers outside of the cell (solvent and solute) add up to __________ % and the
concentration numbers inside the cell add up to __________ %
27. When you are talking about osmosis, the only concentration % you have to look at is the
____________________ %.
28. Most cells are found in a/an ______________________ state.
29. Active transport means that the cell must use _______________________ to get something into the cell.
30. Name 3 examples of diffusion (include some solids, liquids, and gasses).
31. Why does water move into a cell?
32. What does the term “concentration gradient” mean?
33.
Word bank: transport protein, phospholipid, phosphate, fatty acids
A: _________________ B: _________________ C: ________________ D: __________________
34. Refer to the letters from above to answer the following questions:
- Which part is used to move large or polar molecules across the membrane?
- Which part is a component of the bilayer?
- Which part is hydrophilic?
- Which part is hydrophobic?
35. For each cell diagram, answer the following questions about osmosis:
80%
H2O
A) Which tonic?
B) Where does the water go?
C) Result in regular words:
D) Big words:
30%
solute
30%
H2O
70%
H2O
90%
H2O
60%
H2O
60%
H2O
A) Which tonic?
B) Where does the water go?
C) Result in regular words:
D) Big words:
A) Which tonic?
B) Where does the water go?
C) Result in regular words:
D) Big words:
60%
solute
A) Which tonic?
B) Where does the water go?
C) Result in regular words:
D) Big words:
36. For each cell diagram, answer the following questions about diffusion for Molecule A:
A
A
A
A A
A
A A
A
A
A A
A
A B
B B
A
A
BB
AA A
A A A
AA
A
A
A
A) Which way will
molecule A go?
A) Which way will
molecule A go?
A) Which way will
molecule A go?
B) Why does this happen?
B) Why does this happen?
B) Why does this happen?
38. Below is a diagram of a red blood cell surrounded by intravenous fluid.
39.
40.
41.
42.
How many solvent molecules are in the Red Blood Cell?
How many solute molecules are there in the IV fluid?
The membrane is permeable to water only. Which way will the water go?
Is the IV fluid Hypotonic, Isotonic, or Hypertonic to the Red Blood Cell?
** Do not forget: diffusion is influenced by the concentration of a TYPE of molecule. Each individual
TYPE of molecule will diffuse down its concentration gradient, from high to low concentration, until
equilibrium.**
43. Define “pinocytosis”.
44. Define “phagocytosis”.
45. Define “exocytosis”.
46. Define “endocytosis”.