Author Question: Which of the following is true about threshold for an action potential? A) It is more positive than ... (Read 81 times)

KWilfred · **on:** Feb 28, 2019

Which of the following is true about threshold for an action potential?
A) It is more positive than the resting membrane potential.
B) Voltage-gated potassium channels begin to close.
C) Voltage-gated potassium channels begin to open.
D) The membrane begins to hyperpolarize.
E) Threshold for a typical neuron is approximately -30 mV.

Question 2

A threshold stimulus is the
A) depolarization necessary to cause an action potential.
B) peak of an action potential.
C) hyperpolarization of an axon.
D) resting membrane potential.
E) electrical current that crosses the synaptic cleft.