When you start to exercise, the body responds in various ways due to internal stimuli. one response is an increase in heart rate. identify a stimulus that would cause an increase in heart rate.
a. a decrease in body temperature
b. an increase in oxygen levels in the blood
c. a decrease in the rate of cellular respiration
d. an increase in carbon dioxide levels in the blood?
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When you start to exercise, the body responds in various ways due to internal stimuli. one response...
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