What is the condition resulting from excessive loss of water and salt due to prolonged exposure to high temperatures?

• A. Heat exhaustion
• B. Fever
• C. Bronchodilation
• D. Bronchoconstriction

Answer: (A)

Excessive loss of water and salt from prolonged exposure to high temperatures dehydrates the body. Sweating in the heat removes fluids and electrolytes, lowering blood volume and making the heart work harder to circulate blood. This combination produces fatigue, weakness, dizziness, and sometimes nausea—classic signs of heat exhaustion. Fever isn’t caused by fluid loss from sweating; it’s a rise in body temperature driven by infection or other regulatory factors. The other options describe airway muscle changes, which aren’t related to dehydration from heat.