Which electrolyte plays a crucial role in maintaining the resting membrane potential of neurons and regulating the activity of nerve and muscle cells?

A Sodium
B Potassium ✓
C Calcium
D Magnesium

Explanation

Potassium is essential for maintaining the resting membrane potential of neurons and regulating the activity of nerve and muscle cells.

Mnemonic

POTASS = Potential Of Transmitting Action Signals Safely

Source

Berne and Levy Physiology
Electrolytes and Acid-Base Balance Physiology Electrolyte Function Medium MEDICAL Confidence: high