The _______________ period of the action potential is the period of time following an action potential during wheich only stronger than normal stimuli can initate a second action potential. a. absolute refractory b. muscarinic refractory c. gustatory refractory d. relative refractory

The _______________ period of the action potential is the period of time following an action potential during wheich only stronger than normal stimuli can initate a second action potential.
a. absolute refractory
b. muscarinic refractory
c. gustatory refractory
d. relative refractory

Answer

• a. absolute refractory
  Explanation:

• While an action potential is in progress, another one cannot be initiated, which is called refractory period.
• The two phases of a refractory period are absolute refractory period and relative refractory period.
• During absolute refractory period, another action potential cannot be started because the voltage-gated sodium channels are inactivated.
• Once the channel is open, another action potential can be generated but only by a stronger stimulus than the current one.

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