Question

Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron's reaction is?

a. inhibited by the myelin sheath
b. delayed by glial cells
c. an all-or-none response
d. monozygotic

Answer 1

An action potential is an all-or-none response, meaning it either occurs completely or not at all. Increasing excitatory signals above the threshold for neural activation will not affect the intensity of the action potential. The correct answer is c. an all-or-none response.

Step-by-step explanation:

The correct answer is c. an all-or-none response.

An action potential is an electrical signal generated by a neuron when it reaches a certain threshold of excitation. Once the threshold is reached, the action potential is triggered and it will propagate down the entire length of the axon without diminishing in intensity. This is known as an all-or-none response, meaning that the action potential either occurs completely or not at all.

Increasing the excitatory signals above the threshold does not affect the intensity of the action potential. Instead, it can lead to increased frequency of action potentials, but not an increase in their intensity.