Marcus is conducting a squid axon electrophysiology experiment with Dr.Flores.While monitoring a recording electrode placed within a squid axon,Marcus reports to Dr.Flores that the neuron is in a refractory period.What does this mean?
A)The cell is hyperpolarized and another action potential is unlikely or impossible.
B)The cell is depolarized and cannot fire another action potential.
C)The cell is hyperpolarized and is getting ready to fire a larger action potential.
D)The cell is depolarized and is getting ready to fire a larger action potential.

Question

Quizplus · Accepted Answer

During the refractory period, the neuron is temporarily unable to produce another action potential. In the absolute refractory period, the neuron is incapable of producing another action potential, regardless of the stimulus. This occurs when the voltage-gated sodium channels are inactivated and cannot be opened. In the relative refractory period, the neuron requires a stronger than normal stimulus to produce another action potential. This occurs when the membrane potential is hyperpolarized, making it more difficult for the voltage-gated sodium channels to open. Therefore, choice A is the best answer as it describes the hyperpolarization of the cell during the refractory period.

Marcus Is Conducting a Squid Axon Electrophysiology Experiment with Dr