Thsarcomeris shorteneduring musclcontraction because
A) the actin filaments shorten in length.
B) the myosin filaments shorten in length.
C) the actin filaments move towards the sarcomere's center.
D) the actin filaments shorten while the myosin filaments lengthen.
E) the myosin filaments shorten while the actin filaments lengthen.
Correct Answer:
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Q47: What typof exercisprograincreases a muscle's ability to
Q48: What is thmusclfiber to motor neuron ratio
Q49: Aerobic respiration does which of thfollowing?
A)increases the
Q50: Skeletal muscles makup approximately _ % of
Q51: What typof exercismakes muscles morresistant to fatigue?
A)anaerobic
Q53: What pathway converts pyruvates into lactate?
A)fermentation
B)anaerobic respiration
C)aerobic
Q54: Musclforcwill increasif
A)many fibers are stimulated at the
Q55: What is thmechanical forcexerteby a musclon an
Q56: During exercise, which pathway produces thmost energy?
A)fermentation
B)anaerobic
Q57: What is thcontraction of all of thfibers
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