★ Physio Intro Practice Quiz
What system breaks food down into energy for the body?
A. Stomach
B. Digestive System
C. Respiratory system
D. Lungs
Preview next quiz:
A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?
A. heart rate
B. type of exercise
C. amount of exercise
D. time of day exercise occurs
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