Final answer:
The parasympathetic motor neurons and motor neurons that innervate skeletal muscle use the same neurotransmitter, acetylcholine.
Step-by-step explanation:
The parasympathetic motor neurons that innervate the effector organ use the same neurotransmitter as the motor neurons that innervate skeletal muscle.
A neurotransmitter is a chemical substance that transmits signals between nerve cells or from nerve cells to muscles or glands.
In both cases, acetylcholine is the primary neurotransmitter used.
Learn more about Neurotransmitters