Which of the following electrolytes plays a crucial role in regulating the resting membrane potential of neurons and muscle cells?

A Sodium
B Potassium ✓
C Calcium
D Magnesium

Explanation

Potassium ions play a crucial role in regulating the resting membrane potential of neurons and muscle cells. The movement of potassium ions out of the cell helps to establish the negative resting membrane potential.

Source

Berne and Levy Physiology
Electrolytes and Acid-Base Balance Physiology Electrolytes and Membrane Potential Easy MEDICAL Confidence: high