Question

question 44 (1 point)
which neurotransmitter is associated with the control of voluntary movement?
serotonin
acetylcholine
gaba
dopamine
question 45 (1 point)
during an action potential, the electrical charge inside the neuron is _________ compared to the electrical charge during the resting potential.
neutral
balanced
positive
negative

Explanation:

Question 44

• Serotonin: Involved in mood, sleep, etc., not voluntary movement.
• Acetylcholine: Key for muscle contraction (voluntary movement). Motor neurons release it to signal muscles.
• GABA: Inhibitory neurotransmitter, not for voluntary movement.
• Dopamine: Related to reward, motivation, motor control (but acetylcholine is more directly linked to initiating voluntary muscle - related movement).

• Resting potential: Inside of neuron is negative (due to more \(K^{+}\) inside and \(Na^{+}\) outside, and large anions inside).
• Action potential: Depolarization occurs. \(Na^{+}\) channels open, \(Na^{+}\) rushes in. So the inside of the neuron becomes positive compared to the resting potential.

Answer:

Acetylcholine

Question 45