For a skeletal muscle to contract, all of the following must occur EXCEPT ______.
a. calcium levels must increase in close proximity to contractile proteins.
b. a drop in calcium levels also stimulates contraction.
c. once the stimulation by a nerve ceases, skeletal muscle can no longer contract.
d. a nerve impulse is required to initiate contraction.
e. All of these are correct.
Ans: b. a drop in calcium levels also stimulates contraction.
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