Regular aerobic exercise improves the functioning of the
A) lungs, bronchi, and large vessels.
B) bones and muscles.
C) skeletal and cardiac muscles.
D) heart, lungs, and blood vessels.
Answer: D
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Interferons increase the activity of _____
A) erythrocytes and leukocytes B) macrophages and natural killer cells C) phagocytes and neutrophils D) plasma and complement
The suffix -tripsy means "surgical repair."
Indicate whether the statement is true or false
Children and adolescents should do ____ or more of physical activity every day.​
a.​20 minutes b.30 minutes​ c.45 minutes​ d.1 hour​ e.90 minutes​
Which of the following statements is/are true?
A. Two-joint muscles function more effectively at one joint when the position of the other joint stretches the muscle slightly. B. The iliopsoas complex is the major flexor of the hip. C. Both the iliopsoas complex is the major flexor of the hip and two-joint muscles function more effectively at one joint when the position of the other joint stretches the muscle slightly. D. None of these answers is correct.