Transferring messages from a motor neuron to an arm muscle requires the neurotransmitter known as: (2 points)

dopamine

epinephrine

acetylcholine

glutamate

insulin

Acetylcholine

Explanation:A neuron is a specialized cell of the nervous system that is responsible for the transmission of nervous signals in the body.A motor neuron is one of the three major types of neurons, others being sensory neuron and relay neuron.A motor neuron is responsible for the transmission of nerve impulses from the CNS to the effector organs, such as muscles and glands.Transmission of nerve impulses through the motor neuron to the muscles requires a chemical messenger known as acetylcholine, which is associated with movements among other activities.