Two fundamental principles that characterize gated ion channels in the neuronal membrane are that the channels
A) are always open, but the concentration gradients of ions frequently change.
B) are always closed, but ions move closer to the channels during excitation.
C) open and close depending on stimuli and are specific as to which ion can traverse them.
D) open and close depending on chemical messengers and are nonspecific as to which ion can traverse them.
E) open in response to stimuli and then close simultaneously, in unison.

Question

Quizplus · Accepted Answer

Gated ion channels in neuronal membranes are specific to which type of ion can pass through them, and they open and close in response to stimuli such as voltage changes or neurotransmitter binding. This specificity is essential for the regulation of ion flow and the generation of electrical signals in neurons. Options A, B, D, and E do not accurately describe the behavior of gated ion channels.

Two Fundamental Principles That Characterize Gated Ion Channels in the Neuronal