Physical Therapy Assistant Practice Exam 2026 – Complete Prep Guide

The choice indicating hypokalemia is correct because potassium is a crucial electrolyte that plays a significant role in muscle function and contraction. During prolonged or intense exercise, the body loses potassium through sweat, and if the lost potassium is not adequately replaced, it can lead to a deficiency. This lack of potassium can interfere with normal muscle function, resulting in symptoms such as muscle cramping, weakness, and even arrhythmias.

Maintaining appropriate levels of potassium is essential for neuromuscular function, and when levels drop too low, the excitability of muscle fibers is compromised, causing cramps. This is particularly noticeable in athletes or individuals engaged in strenuous physical activities where potassium loss may be more pronounced.

Understanding the role of potassium in muscle function helps to appreciate why its deficiency can lead to the described symptoms, making hypokalemia a key consideration in the context of exercise-related electrolyte imbalances.