Multiple Choice
An action potential is self-regenerating because:
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45. Nervous System
Neurons and Action Potentials
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Even at rest, most neurons have periodic production of action potentials, known as the ____.
A
graded potential
B
spontaneous firing rate
C
absolute refractory period
D
threshold potential
Verified step by step guidance1
Step 1: Begin by understanding the key terms in the problem. An action potential is a rapid electrical signal that travels along the membrane of a neuron. It is triggered when the neuron reaches a certain threshold potential.
Step 2: Review the concept of 'spontaneous firing rate.' This refers to the periodic production of action potentials by neurons even when they are not actively stimulated. It is a baseline activity of neurons.
Step 3: Compare the other options provided in the problem. 'Graded potential' refers to small changes in membrane potential that do not reach the threshold to trigger an action potential. 'Absolute refractory period' is the time during which a neuron cannot fire another action potential after one has occurred. 'Threshold potential' is the specific membrane potential that must be reached for an action potential to be initiated.
Step 4: Eliminate the incorrect options based on their definitions. The 'spontaneous firing rate' is the correct term that describes the periodic production of action potentials at rest, as it matches the description in the problem.
Step 5: Conclude that the correct answer is 'spontaneous firing rate,' as it aligns with the concept of neurons producing action potentials periodically even at rest.
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