If a physical or chemical stimulus causes a change in a cell's membrane potential, a direct effect of that change may be A) an increase in Na⁺ concentration outside the cell. B) increased permeability of the cell membrane to certain ions. C) an increase in pumps. D) an increase in the number of K⁺ ions needed to reach equilibrium. E) an increase in the lipid composition of the membrane.

Question

Quizplus · Accepted Answer

A change in membrane potential can lead to the opening or closing of ion channels, affecting the permeability of the membrane to certain ions. This can result in an influx or efflux of ions, leading to a change in the internal chemical environment of the cell. The other choices listed are not directly related to changes in membrane potential.

If a Physical or Chemical Stimulus Causes a Change in a Cell's