The _______ is the voltage level at which an action potential is triggered in a patch of axon membrane.
a. resting membrane potential
b. hyperpolarization event
c. threshold of excitation
d. rate level
e. refractory period
Question 2
A(n) _______ will be recorded from a nerve cell whose membrane potential rises above threshold.
a. action potential
b. local potential
c. downward shift of the threshold of excitation
d. upward shift of the membrane threshold
e. long-term change in the membrane potential
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