A patient is hospitalized with muscle spasms caused by failure of back muscles to relax after contraction. Which of the following would be most likely to help?
A) injecting calcium into the muscle cell, because it is not being released from the sarcoplasmic reticulum
B) inducing tropomyosin-troponin complex to block the myosin binding sites on actin
C) increasing the amount of acetylcholine at the synapses between motor neurons and muscle cells
D) depolarizing the motor neurons to send an action potential to the muscle cells
Correct Answer:
Verified
Q1: Which muscle type(s) is (are) composed of
Q2: Motor neurons release the neurotransmitter acetylcholine (ACh),
Q3: The contraction of skeletal muscles is based
Q4: When muscle is at rest, the myosin
Q5: What would happen to people exposed to
Q7: Compared to slow oxidative muscle fibers, those
Q8: The calcium ions released into the cytosol
Q9: All skeletal muscle fibers are _.
A) smooth
Q10: Which muscle type(s) is (are) involuntary?
A) smooth
Q11: Skeletal muscle contraction begins when calcium ions
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