The neurotransmitter released by somatic motor neurons is:
a. Acetylcholine
b. Acetylcholinesterase
c. Norepinephrine

Verified step by step guidance

1. Understand the role of somatic motor neurons: These neurons control voluntary muscle movements by transmitting signals to skeletal muscles.
2. Recall the neurotransmitters involved in the nervous system: Acetylcholine (ACh) is commonly associated with muscle activation, while norepinephrine is more related to the autonomic nervous system.
3. Identify the neurotransmitter released at the neuromuscular junction by somatic motor neurons, which is responsible for stimulating skeletal muscle contraction.
4. Differentiate between acetylcholine and acetylcholinesterase: acetylcholine is the neurotransmitter, whereas acetylcholinesterase is the enzyme that breaks down acetylcholine after its action.
5. Conclude that the neurotransmitter released by somatic motor neurons is acetylcholine.

Key Concepts

Somatic Motor Neurons

Somatic motor neurons are nerve cells that control voluntary muscle movements by transmitting signals from the central nervous system to skeletal muscles. They play a key role in conscious motor control and reflexes.

Neurotransmitters

Neurotransmitters are chemical messengers that transmit signals across synapses from neurons to target cells. Different neurotransmitters have specific roles; for example, acetylcholine is commonly involved in muscle activation.

Acetylcholine and Acetylcholinesterase

Acetylcholine is the primary neurotransmitter released by somatic motor neurons to stimulate muscle contraction. Acetylcholinesterase is an enzyme that breaks down acetylcholine in the synaptic cleft, terminating the signal and allowing muscle relaxation.