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Transcript
Active Transport Quiz Answers
1. True or False: Active transport requires ATP.
true 2. True or False: Active transport can be considered the opposite of
diffusion.
true 3. Define active transport.
Active transport is the movement of molecules across a membrane during which molecules move from an area of low concentration to an area of high concentration. 4. What is the sodium-potassium pump?
The sodium-­‚Äźpotassium pump is an active transport carrier protein. 5. What type of protein is required for active transport?
Active transport always requires a carrier protein. 6. Which statement is true concerning the sodium-potassium pump?
a) The pump moves sodium ions out of the cell and potassium ions into the cell.
b) The pump moves sodium ions into the cell and potassium ions out of the cell.
c) The pump moves both sodium and potassium ions out of the cell.
d) The pump moves both sodium and potassium ions into the cell.
7. Which statement is true concerning active transport?
a) During active transport, molecules move from an area of high concentration
to an area of low concentration.
b) During active transport, molecules move from an area of low concentration to
an area of high concentration.
c) Active transport is called "active" because it involves a protein pump.
d) Active transport is called "active" because it involves an active channel
protein.
8. Your nerve cells pump sodium ions from the extracellular space into
the cell. How do the sodium ions get back out of the cell?
a) by active transport
b) by simple diffusion
c) by facilitated diffusion
d) all of the above
9. Complete the following sentence. As molecules are moving against
their concentration gradients, active transport cannot occur without
__________.
a) a channel protein
b) a carrier protein
c) the sodium-potassium pump
d) facilitated diffusion
10. Why are active transport proteins referred to as pumps?
a) Because they release energy into the cell.
b) Because they move molecules across the membrane.
c) Because they use energy to pump the molecules against their concentration
gradient.
d) all of the above