For a typical neuron, what limits the maximal frequency attainable of action potentials moving down an axon?Multiple ChoiceThe refractory periodThe types of ions contributing to the action potentialThe strength of each action potentialThe strengths of the graded potentials on the neuron cell body and/or dendrites
Question
For a typical neuron, what limits the maximal frequency attainable of action potentials moving down an axon?Multiple ChoiceThe refractory periodThe types of ions contributing to the action potentialThe strength of each action potentialThe strengths of the graded potentials on the neuron cell body and/or dendrites
Solution
The maximal frequency attainable of action potentials moving down an axon in a typical neuron is limited by the refractory period.
Here's why:
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An action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern.
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Once an action potential has occurred, there is a period of time during which a second action potential is difficult or impossible to initiate. This is known as the refractory period.
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The refractory period is divided into two sections: the absolute refractory period, during which it is impossible to initiate another action potential, and the relative refractory period, during which a stronger-than-usual stimulus is required to initiate another action potential.
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The refractory period thus sets a limit on the number of action potentials that can be propagated along an axon per unit of time, i
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