A Neuron's Repetitive Firing Rate Is Limited by an Absolute

question 29

Multiple Choice

A neuron's repetitive firing rate is limited by an absolute refractory period, during which a new action potential cannot be generated. Which event is chiefly responsible for this limit?

• A) Opening of K⁺ leak channels.
• B) Opening of voltage-gated Na⁺ channels.
• C) Opening of transmitter-gated cation channels.
• D) Inactivation of voltage-gated K⁺ channels.
• E) Inactivation of voltage-gated Na⁺ channels.

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