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Cell Transport Review Sheet.
Part I – Label the following:
A.
C.
D.
E.
B.
Part II – Fill in the blank
1. The process of diffusion causes molecules to move from (low to high or high to low)
concentrations until a state of ____________________ is reached.
2. The diffusion of water is known as __________________.
3. ________________ diffusion uses proteins to bring materials into the cell from high to
low concentration, requiring no cell energy.
4. Diffusion, osmosis and facilitated diffusion are all examples of _____________ transport,
in which the cell does not need to use any energy.
5. During active transport molecules move from an area of ___________ concentration to
an area of ____________ concentration.
6. ________________ is a form of active transport in which the cell sends materials out of
the cell using vesicles, small storage structures that fuse to the cell membrane.
7. _________________ is the reverse of the process named in # 6. The cell membrane
wraps around a substance to be brought into the cell forming a vesicle around it.
8. There are two types of endocytosis: __________________ which involves bringing
solids or large molecules into the cell, and _________________, which deals with
bringing liquids or very small molecules into the cell.
9. In the pictures below each “X” represents a molecule of water. In each diagram indicate
which direction water will be moving (mostly in, mostly out, or equally in and out).
XXXXX
XXXXX
XXXXX
A.
XX
B.
XXXXX
XXXXX
XXXXX
C.
10. Look at each of the pictures below. Identify whether the picture represents a plant cell in
hypertonic, hypotonic or isotonic solutions.
A.________________
B.______________ C._________________
11. Look at each of the pictures below. Identify whether the picture represents a blood cell in
fresh water (small amount of solute), distilled water (100% water) or salt water (lots of
solute). A.________________ B.________________ C. _______________
A
B
C
12. Would a potato left in salt water lose or gain water? Think about what is different about
the amount of water inside and outside the cell, and what state were the potato cells
trying to reach?
13. The cell in this beaker is bathed in a 5% NaCl (salt) solution. The membrane is permeable to
water but not to NaCl.
10% NaCl
____ H2O
i. In which direction is the net movement of
water here?
ii. Is the solution around the cell hypertonic or
hypotonic?
5% NaCl
____ H2O
iii. Will the cell shrink or swell?
14. How do facilitated diffusion and active transport differ?
List at least two ways:
____________________________________
____________________________________
15. Is osmosis an example of diffusion or active transport (use evidence to support your answer)?
16. Why does water need a special protein channel (called an aquaporin) to move into the
cell through the phospholipid bilayer.
17. Draw a picture of a phospholipid below and label the non-polar tails, and polar head.
18. Passive transport moves materials with/against the concentration gradient using
energy/no energy. Also draw two arrows on the figure below labeling one “with
concentration gradient” and the other “against concentration gradient”.
19. Active transport moves materials with/against the concentration gradient using energy/no
energy.
20. State how each of the molecules/ions listed below would move through the plasma
membrane (pick from: PC= protein channel or SD = simple diffusion – through
phospholipids).
a.
b.
c.
d.
e.
f.
g.
Glucose __________
Water
__________
Oxygen __________
Na+
__________
K+
__________
Cl__________
CO2
___________
21. Identify which type of active transport each of the cells below are doing (exocytosis,
endocytosis, protein pumps).
________________________
_____________________
_______________________
Use the picture on the left to answer the questions on the right.
22. After you have eaten and digestion occurs:
= glucose molecule
a. Which area has the higher concentration of glucose?
_____________________
blood
cell
b. Which way will the glucose move (in or out of cell)?
________________________
c. Does this require energy? ___________
d. Is this active or passive transport?
_______________________
e. What specific type of transport is this knowing that
glucose is a large polar molecule? ___________________
________________________