Which of the following ions plays a crucial role in maintaining the resting membrane potential of neurons and is also involved in the regulation of acid-base balance?

A Sodium (Na+)
B Potassium (K+) ✓
C Calcium (Ca2+)
D Chloride (Cl-)

Explanation

Potassium (K+) plays a crucial role in maintaining the resting membrane potential of neurons and is also involved in the regulation of acid-base balance.

Mnemonic

Potassium = 'POT' → potential

Source

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