Download CELL ENVIRONMENTS REVIEW SHEET

CELL ENVIRONMENTS REVIEW SHEET
NAME ___________________________
1. What is diffusion?
2. Name three examples of diffusion.
3. Molecules move from a ___________________ concentration to a
___________________ concentration in order to reach a balanced state
called _________________________
4. What is osmosis? Explain and be specific.
5. What is the difference between diffusion and osmosis? Provide an
example for each.
6. TRUE OR FALSE: When making popcorn, the “scent molecules” are
highly concentrated inside the package while being popped. When you
open the package and release the molecules, hat would be an example of
osmosis. Explain whether this statement is true or false and WHY.
7. The movement of water from a greater to lesser concentration through a
semi-permeable membrane is an example of what?
8. Define “semi-permeable”.
Define “permeable”.
Define “impermeable”.
Directions: Label each statement with either “ISOTONIC”
“HYPOTONIC” OR “HYPERTONIC” for questions #9-11.
9. If there is more water on the outside of the cell than inside, we would say
that it is….
10. If there is 92% water inside the cell and 92% water outside the cell, then
it would be considered….
11. There is an equal distribution of water inside as there is outside of the
cell….
Directions: In each problem, the questions are as follows:
a. Where is there more water?
b. Which way does the water go?
c. What tonic?
d. What are the results in regular words (take note if it is a PLANT or an
ANIMAL cell)
e. The result in large vocab words (plasmolysis, plasmoptysis, turgid,
flaccid)
12.
65% H2O
13.
92.5%
H2O
14.
98% H2O
15.
15%
salt
16.
25% sugar
a.
85% H2O . b.
c.
d.
e.
a.
b.
92.5%
c.
H2O
d.
e.
a.
b.
10%
c.
salt
d.
e.
a.
b.
95% H2O
c.
d.
e.
a.
b.
15%
c.
salt
d.
e.
17. Define the word “homeostasis”.
18. Give three examples of homeostasis:
a.
b.
c.
19. Use the diagram from your notes to label the cell membrane:
QuickTime™ and a
decompressor
are needed to see this picture.
20. What are the functions of the cell membrane? Name two.
a.
b.
21. What is a “phospholipid bilayer”?
22. Which part of a phospholipid mixes with water?
23. Which part of a phospholipid does not mix with water?
24. Define “hydrophilic”. (use online activity 6.2)
25. Define “hydrophobic”. (use online activity 6.2)
26. What is “facilitated diffusion” and what molecules need to use it?
27.
28.
29.
30.
31.
Does diffusion use energy from the cell?
Does osmosis use energy from the cell?
Does facilitated transport use energy from the cell?
Does active transport use energy from the cell?
Define active transport and why does a cell need to do this?
32. List the two TYPES of active transport discussed in class.
E______________________________
E______________________________
33. Which type of active transport moves materials into the cell?
34. Which type of active transport pushes materials out of the cell?
35. In active transport, molecules go from an area of _______________
concentration to an area of ____________ concentration, which is
____________ the “concentration gradient”.
34. In passive transport (diffusion, osmosis, facil. diffusion), molecules go
from an area of _______________ concentration to an area of
________________ concentration, which is _____________ the
“concentration gradient”.
35. When we did the plastic bags experiment with the starch, which
molecule/s could move across the plastic bag and WHY?