A muscle relaxes after contracting when
A) calcium is taken up by internal organelles.
B) internal acetylcholine is broken apart by acetylcholinesterase.
C) troponin is taken up by internal organelles.
D) myosin and actin begin to interact.
Correct Answer:
Verified
Q6: The separation of actin molecules from myosin
Q7: Slow-twitch muscle fibers are to _ as
Q7: Muscle fibers contract when Z lines move
Q8: Q9: Nutrients are moved through the digestive tract Q11: Rigor mortis,or the muscle stiffness present after Q12: Muscle fibers respond to Q15: In a resting muscle fiber,_ is covered Q18: Action potentials in muscle fibers Q20: Slow-twitch fibers and fast-twitch fibers are both
A)serotonin.
B)glutamate.
C)dopamine.
D)acetylcholine.
A) do not
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