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
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