Multiple Choice
Which of the following is involved in the gradation of muscle contraction?
A) variation in the number of motor units activated
B) variation in the frequency of action potentials initiated in each muscle fiber
C) variation in the size of the action potentials initiated in each muscle fiber
D) both (a) and (b) above.
E) all of these answers.
Correct Answer:
Verified
Correct Answer:
Verified
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