Jeremy is sitting quietly when the muscles in his left leg begin to "twitch." This activation of movement in his voluntary muscles is most likely due to the release of the neurotransmitter
A) serotonin.
B) dopamine.
C) acetylcholine.
D) norepinephrine.

Question

Quizplus · Accepted Answer

Acetylcholine is known as the neurotransmitter responsible for initiating muscle movement by activating skeletal muscles. Therefore, it is the most likely candidate for the muscle twitching experienced by Jeremy. Serotonin, dopamine, and norepinephrine are not directly involved in muscle movement.

Jeremy Is Sitting Quietly When the Muscles in His Left