Lights, Camera, Acting Transport!
Pre-Activity Test
ANSWER KEY
Please respond to the following questions to the best of your ability.
1. Which of the following substances can easily diffuse across the lipid bilayer of the cell membrane?
(Circle all that apply.)
a. H20
b. K+
c. O2
d. CO2
e. hydrocarbons
f. glucose
g. ATP
2. Which of the following statements about facilitated diffusion and active transport is true?
a. Both processes require proteins, and are therefore both considered forms of active
transport.
b. Facilitated diffusion involves channel proteins, but not carrier proteins; active transport
involves carrier proteins, but not channel proteins.
c. Both processes transport substances against their electrochemical gradients.
d. Facilitated diffusion is driven by electrochemical gradients, whereas active transport
requires an additional source of energy.
3. A key function of the sodium-potassium pump…
a. is to create and maintain a membrane potential across animal cell membranes.
b. is to balance the charges across the cell membranes of animal cells.
c. is to build up potassium outside the cell and sodium inside the cell.
d. is to regenerate ATP by adding a phosphate to ADP.
4. The mechanism of co-transport…
a. is a type of active transport that requires energy in the form of ATP.
b. is a type of active transport that does NOT require energy in the form of ATP.
c. is a type of passive transport that does NOT require energy in the form of ATP.
d. is a type of passive transport that requires energy in the form of ATP.
5. A sodium-glucose cotransporter…
a. transports sodium against its electrochemical gradient, but glucose with its
electrochemical gradient.
b. transports glucose against its electrochemical gradient, but sodium with its
electrochemical gradient.
c. transports both sodium and glucose against their electrochemical gradients.
d. transports neither sodium nor glucose against its electrochemical gradient.
6. I am confident in my understanding of passive and active membrane transport.
a. Agree
b. Agree somewhat
c. Disagree somewhat
d. Disagree
7. I prefer to learn by (circle all that apply):
a. listening to a lecture.
b. reading a topic on my own.
c. performing a hands-on activity.
d. other: ____________________________