Which of the following physiological variables does not respond quickly to a "dose" of exercise? sympathetic nervous system. capillary number. blood lactate heart rate adaptation
Question
Which of the following physiological variables does not respond quickly to a "dose" of exercise? sympathetic nervous system. capillary number. blood lactate heart rate adaptation
Solution
The physiological variable that does not respond quickly to a "dose" of exercise is the capillary number. This is because the growth of new capillaries (capillarization) is a long-term adaptation to regular exercise, not something that happens immediately during or after a single bout of exercise.
On the other hand, the sympathetic nervous system, blood lactate levels, and heart rate adaptation can all respond quickly during exercise. The sympathetic nervous system increases its activity to prepare the body for exercise (the "fight or flight" response), blood lactate levels can rise during intense exercise as a result of anaerobic metabolism, and heart rate increases almost immediately with exercise to supply the muscles with more oxygen and nutrients.
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