A graded hyperpolarization of a membrane can be induced by ________.
A) increasing its membrane's permeability to Na⁺
B) decreasing its membrane's permeability to Cl⁻
C) increasing its membrane's permeability to Ca⁺⁺
D) increasing its membrane's permeability to K⁺

Question

Quizplus · Accepted Answer

Increasing membrane permeability to K⁺ allows more K⁺ ions to leave the cell, creating a negative charge inside the cell and resulting in a graded hyperpolarization. Increasing permeability to Na⁺ or Ca⁺⁺ would result in depolarization, and decreasing permeability to Cl⁻ would have little effect on membrane potential.

A Graded Hyperpolarization of a Membrane Can Be Induced by ________