In addition to gas exchange, the respiratory system plays a key role in
a. enhancing venous return
b. water and temperature balance
c. body defense
d. enhancing venous return and body defense
e. all of the above
E
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A child's growth would be stunted by thyroid hormone deficiency.
Answer the following statement true (T) or false (F)
The structural theory that explains how a muscle fiber contracts is called the ________ theory
A) sliding filament B) excitation-contraction coupling C) neuromuscular D) muscle contraction E) action-myosin interaction
Which of the following bones belongs in the axial skeleton?
A) clavicle B) phalanges C) fibula D) sternum
Which of the following explains why people get gray hair as they age?
A. Collagen decreases in quantity and function with aging. B. Melanocytes decrease in function with aging. C. Sebaceous glands decrease in number and function with aging. D. Hair follicles atrophy and decrease in function with aging.