NSC 2201 QUESTIONS AND
CORRECT ANSWERS < RECENT
VERSION 2025/2026 > SURE TO
PASS!!
1. Which of the following is NOT made entirely of
proteins?
a. Enzymes
b. Membrane Pumps
c. Cytoskeleton
d. Cell membrane
e. Membrane Channels - ANSWER ✓ D
2. A peptide bond:
a. Connects the R group of each amino acid to the
carboxyl group and the amino group
b. Links amino acids in a single-chain polypeptide by
joining the carboxyl group on one with the amino group
of the other
,c. Links amino groups together or links carboxyl groups
together, depending on whether the peptide bond is
positive or negative
d. Binds a protein to a nonprotein - ANSWER ✓ B
3. Calling a synapse axo-dendritic means:
a. the axon of the post-synaptic neuron synapses on the
dendrite of the pre-synaptic neuron
b. the axon of the pre-synaptic neuron turns into a
dendrite near the axon terminal
c. the axon of the pre-synaptic neuron synapses on the
dendrite of the post-synaptic neuron
d. the neuron only has axons and dendrites, but no soma
e. the neuron has very long dendrites - ANSWER ✓ C
4. All of the following contribute to the establishment of
the resting membrane potential EXCEPT:
a. K+ channels
b. Na+ channels
c. The concentration gradients of K+ and Na+ across the
membrane
,d. Both a and b
e. There are no exceptions; all of the above are important.
- ANSWER ✓ E
5. Match questions 13-16 with the one best answer
below:
13. EPSP ___
14. equilibrium potential__
15. action potential__
16. resting membrane potential___
a. is the result of the action of the Na+/ K+ pump
b. is an all-or-none response
c. is related to the concentration of an ion inside & outside
of a cell
d. the weighted average of equilibrium potentials for Na+
and K+
e. is a graded response - ANSWER ✓ E, C, B, D
17. During the falling phase of an action potential, the
voltage-gated sodium channels are mostly
, _____________, the delayed rectifier channels are mostly
_______________.
a. activated; open
b. activated; closed
c. inactivated; open
d. inactivated; closed - ANSWER ✓ C,
18. The Na+ / K+ Pump starts working, pumping Na+
out and K+ into the neuron. What is the membrane
potential after the pumps have separated the ions? Note:
No ion channels are opened yet.
a. Vm = - 65 mV
b. Vm = - 80 mV
c. Vm = + 62 mV
d. Vm = 0 mV - ANSWER ✓ D
19. A negative ion has an equilibrium potential of +65
mV. In a typical neuron, which way will current flow if
channels for this ion are opened?
a. into the cell
b. out of the cell
CORRECT ANSWERS < RECENT
VERSION 2025/2026 > SURE TO
PASS!!
1. Which of the following is NOT made entirely of
proteins?
a. Enzymes
b. Membrane Pumps
c. Cytoskeleton
d. Cell membrane
e. Membrane Channels - ANSWER ✓ D
2. A peptide bond:
a. Connects the R group of each amino acid to the
carboxyl group and the amino group
b. Links amino acids in a single-chain polypeptide by
joining the carboxyl group on one with the amino group
of the other
,c. Links amino groups together or links carboxyl groups
together, depending on whether the peptide bond is
positive or negative
d. Binds a protein to a nonprotein - ANSWER ✓ B
3. Calling a synapse axo-dendritic means:
a. the axon of the post-synaptic neuron synapses on the
dendrite of the pre-synaptic neuron
b. the axon of the pre-synaptic neuron turns into a
dendrite near the axon terminal
c. the axon of the pre-synaptic neuron synapses on the
dendrite of the post-synaptic neuron
d. the neuron only has axons and dendrites, but no soma
e. the neuron has very long dendrites - ANSWER ✓ C
4. All of the following contribute to the establishment of
the resting membrane potential EXCEPT:
a. K+ channels
b. Na+ channels
c. The concentration gradients of K+ and Na+ across the
membrane
,d. Both a and b
e. There are no exceptions; all of the above are important.
- ANSWER ✓ E
5. Match questions 13-16 with the one best answer
below:
13. EPSP ___
14. equilibrium potential__
15. action potential__
16. resting membrane potential___
a. is the result of the action of the Na+/ K+ pump
b. is an all-or-none response
c. is related to the concentration of an ion inside & outside
of a cell
d. the weighted average of equilibrium potentials for Na+
and K+
e. is a graded response - ANSWER ✓ E, C, B, D
17. During the falling phase of an action potential, the
voltage-gated sodium channels are mostly
, _____________, the delayed rectifier channels are mostly
_______________.
a. activated; open
b. activated; closed
c. inactivated; open
d. inactivated; closed - ANSWER ✓ C,
18. The Na+ / K+ Pump starts working, pumping Na+
out and K+ into the neuron. What is the membrane
potential after the pumps have separated the ions? Note:
No ion channels are opened yet.
a. Vm = - 65 mV
b. Vm = - 80 mV
c. Vm = + 62 mV
d. Vm = 0 mV - ANSWER ✓ D
19. A negative ion has an equilibrium potential of +65
mV. In a typical neuron, which way will current flow if
channels for this ion are opened?
a. into the cell
b. out of the cell
