Which of the following electrolytes plays a crucial role in regulating the amount of water in the body and maintaining proper blood pressure?

A Potassium
B Sodium ✓
C Calcium
D Magnesium

Explanation

Sodium helps regulate the amount of water in the body and maintains proper blood pressure by controlling the amount of water in the blood vessels.

Mnemonic

Sodium = sea water → regulates water balance

Source

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