Voltage-gated channels contain charged protein domains, which are sensitive to changes in membrane potential. By responding to a threshold in the membrane potential, these voltage sensors trigger the opening of the channels. Which of the following best describes the behavior of a population of channels exposed to such a threshold?

a. Some channels remain closed and some open completely

b. all channels open completely

c. all channels open partly, to the same degree

d. all channels open partly, each to a different degree

Answer: Option A

Explanation:

The opening and closing of the voltage gated channels depends on the type of the receptors on it. The cells responds according to the receptors found on the cell membrane.

According to the voltage gated channels the domains that are sensitive towards the gated channels are he particular neurotransmitter can have different receptors on them.

An excitatory postsynaptic potential causes channels to move in and shows excitatory response.

Whereas in case of the Inhibitory postsynaptic potential the channels are closed and they show inhibitory response.

Hence, some of the channels remains closed and some of them remains open after signals.