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Ed is analyzing feedback mechanisms that maintain homeostasis in the human body. He follows the procedure that is listed below. (NOTE: Do not conduct this investigation at this time.) I. Invite a healthy test subject to participate in the investigation. II. Measure and record the pulse and breathing rate of the subject. III. Have the test subject exercise vigorously for 1 minute, such as by running in place. IV. Repeat Step 2. Why is Step 3 useful for Ed's purpose for the investigation? a Exercise causes an increase in the pH of blood and other body fluids. b Exercise increases the body's demand for food and nutrients. c Exercise has no effect on the body's demand for oxygen, food, and nutrients. d Exercise increases the body's demand for oxygen. Tags
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