1. The Resting Membrane Potential
Clicker Questions
Prepared by
Nora Hebert
Red Rocks Community College

3. Concentration gradients exist across the plasma membrane
Concentration gradients exist across the plasma membrane. Specifically, there are ________.
a. more sodium ions inside and more potassium ions outside the plasma membrane
b. more potassium ions inside and more sodium ions outside the plasma membrane
c. more sodium and potassium ions inside the plasma membrane than outside
d. equal concentrations of sodium and potassium ions outside the plasma membrane
Answer: b. more potassium ions inside and more sodium ions outside the plasma membrane

4. Concentration gradients exist across the plasma membrane
Concentration gradients exist across the plasma membrane. Specifically, there are ________.
a. more sodium ions inside and more potassium ions outside the plasma membrane
b. more potassium ions inside and more sodium ions outside the plasma membrane
c. more sodium and potassium ions inside the plasma membrane than outside
d. equal concentrations of sodium and potassium ions outside the plasma membrane

6. The value of the resting membrane potential is ________.
a. –70 mV
b mV
c. –90 mV
d. –55 mV
Answer: a. –70 mV

7. The value of the resting membrane potential is ________.
a. –70 mV
b mV
c. –90 mV
d. –55 mV

9. The plasma membrane is more permeable to ________.
a. sodium ions
b. potassium ions
Answer: b. potassium ions

10. The plasma membrane is more permeable to ________.
a. sodium ions
b. potassium ions

12. The resting membrane potential depends on each item below, EXCEPT:
a. the concentration gradient for sodium ions.
b. the greater permeability of the plasma membrane to potassium ions.
c. the greater permeability of the membrane to anions rather than cations.
d. the greater number of potassium leak channels.
Answer: c. the greater permeability of the membrane to anions rather than cations

13. The resting membrane potential depends on each item below, EXCEPT:
a. the concentration gradient for sodium ions.
b. the greater permeability of the plasma membrane to potassium ions.
c. the greater permeability of the membrane to anions rather than cations.
d. the greater number of potassium leak channels.

15. The Na+/K+ pump transports ________.
a. Na+ into and K+ out of the cell
b. Na+ out of and K+ into the cell
c. equal numbers of Na+ out of and K+ into the cell
d. more K+ into than Na+ out of the cell
Answer: b. Na+ out of and K+ into the cell

16. The Na+/K+ pump transports ________.
a. Na+ into and K+ out of the cell
b. Na+ out of and K+ into the cell
c. equal numbers of Na+ out of and K+ into the cell
d. more K+ into than Na+ out of the cell