A young athlete trained for months over the spring for a 10k race. During the training runs, the temperatures typically ranged from 60 to 75 degrees Fahrenheit. However, on race day, there was a heat wave and the ambient temperature was approximately 90 degrees Fahrenheit. Her body will compensate for this increased environmental temperature by:
A. decreasing salt retention
B. increasing respiration rate
C. increasing heart rate
D. increasing water lost through skin
Click for Explanation
The body compensates for increased environmental temperature by sweating and losing water through the skin. Respiration and heart rate increase during exercise in response to internal demand for more oxygen. Salt retention has little to do with environmental temperature.
A. decreasing salt retention, incorrect.
B. increasing respiration rate, incorrect.
C. increasing heart rate, incorrect.
D. increasing water lost through skin, correct.
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