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PNB 2264 QUIZ 6 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
Most of the ion channels that are open when a cell is at its
resting membrane potential selectively allow which type of ion
to pass through? - ANSWER-potassium (K+)
Which of the following contributes to the negative resting
potential of a typical cell? - ANSWER-all of the above
If we could magically add open K+ (potassium) channels to the
cell membrane of a typical neuron at rest, this would -
ANSWER-hyperpolarize the neuron
Cells have a resting potential in part because of - ANSWER-all
of the above
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A drug that makes inactivation of sodium channels begin
sooner would - ANSWER-decrease amplitudes of action
potentials
When a neuron receives synaptic inputs at overlapping times
from several other neurons, this is called - ANSWER-
summation
Which of the following would typically increase
the size of a postsynaptic potential at a chemical synapse? -
ANSWER-All of the Above
In chemical synaptic transmission involving a second
messenger, the second messenger - ANSWER-is in the cytosol
of the postsynaptic cell
Action potentials typically are initiated - ANSWER-At the axon
hillock
Which happens last during an action potential? - ANSWER-
closing of potassium (K+)
PNB 2264 QUIZ 6 2026 QUESTIONS
AND ANSWERS | A+ GRADED | WITH
EXPERT SOLUTIONS
Most of the ion channels that are open when a cell is at its
resting membrane potential selectively allow which type of ion
to pass through? - ANSWER-potassium (K+)
Which of the following contributes to the negative resting
potential of a typical cell? - ANSWER-all of the above
If we could magically add open K+ (potassium) channels to the
cell membrane of a typical neuron at rest, this would -
ANSWER-hyperpolarize the neuron
Cells have a resting potential in part because of - ANSWER-all
of the above
, Page | 2
A drug that makes inactivation of sodium channels begin
sooner would - ANSWER-decrease amplitudes of action
potentials
When a neuron receives synaptic inputs at overlapping times
from several other neurons, this is called - ANSWER-
summation
Which of the following would typically increase
the size of a postsynaptic potential at a chemical synapse? -
ANSWER-All of the Above
In chemical synaptic transmission involving a second
messenger, the second messenger - ANSWER-is in the cytosol
of the postsynaptic cell
Action potentials typically are initiated - ANSWER-At the axon
hillock
Which happens last during an action potential? - ANSWER-
closing of potassium (K+)
