The direction of change in membrane potential, in response to a stimulus that initiates a graded potential, is dependent upon
A) that membrane's threshold potential.
B) the gating of potassium channels only.
C) the changes in ion concentration across the membrane.
D) the ion channels that are opened or closed.
E) the gating of sodium channels only.

Question

Quizplus · Accepted Answer

The direction of change in membrane potential during a graded potential is primarily determined by which ion channels are opened or closed in response to a stimulus. Different channels allow different ions to flow across the membrane, altering the membrane potential in specific ways.

The Direction of Change in Membrane Potential, in Response to a Stimulus