The first and second heart sounds are most directly related to
A. pulse pressure in the aorta.
B. the contraction of the atria.
C. vibrations that occur when the valves close.
D. contraction of the papillary muscles.
E. the flow of the blood.
C
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What color will blood exhibit if it has a high oxygen content?
A) Blue B) Colorless C) Purple D) Bright red
The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)
A) fascicle. B) tendon. C) ligament. D) epimysium. E) myofibril.
What is the function of antidiuretic hormone (ADH)?
A. Causes large urine volume B. Stimulates loss of water by the kidneys C. Stimulates retention of water by the kidneys D. Causes a darkening of the skin
Which term refers to a molecule stored in muscle fibers that binds oxygen for use in making ATP?
A. Myoglobin B. Monoamine oxidase C. Myofilament D. Myofibril