A) exoskeleton.
B) hydrostatic skeleton.
C) axial skeleton only.
D) endoskeleton.
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A) A band
B) Sarcomere
C) H band
D) I band
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A) calcium
B) ATP
C) phosphate
D) troponin
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A) Long distance runners tend to have more slow-twitch muscle fibers than fast-twitch fibers.
B) A quick contraction and relaxation of an isolated skeletal muscle is called tetanus.
C) Fast-twitch fibers have fewer capillaries and mitochondria than slow-twitch fibers.
D) Slow-twitch muscle fibers have high concentrations of myoglobin.
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A) the release of ATP.
B) the binding of actin to the Z lines.
C) tropomyosin and troponin binding.
D) the release of calcium ions.
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Correct Answer
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