Voltage-Gated Channels Contain Charged Protein Domains, Which Are Sensitive to Changes

Multiple Choice

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.