Diff: 1 Page Ref: 294 23) Which of the following does not act as a stimulus to initiate a muscle contraction?
A. hormonal activity
B. neurotransmitters
C. a change in the pH of a muscle
D. a change of temperature
Answer:D
Diff: 1 Page Ref: 294 23) Which of the following does not act as a stimulus to initiate a muscle contraction?
A. hormonal activity B. neurotransmitters C. a change in the pH of a muscle D. a change of temperature