Which of the following electrolytes plays a crucial role in maintaining the resting membrane potential of neurons and is also involved in the regulation of fluid balance in the body?

A Sodium
B Potassium ✓
C Calcium
D Magnesium

Explanation

Potassium plays a crucial role in maintaining the resting membrane potential of neurons and is also involved in the regulation of fluid balance in the body.

Source

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