Acetylcholine is primarily found in which locations?

Acetylcholine is primarily found in which locations?

• A. Nerves
• B. Nervous System
• C. Muscles
• D. Nerves and muscles

Answer: (D)

Acetylcholine is the chemical messenger released by cholinergic nerve endings to communicate with target cells. It mediates transmission at the neuromuscular junction, where a nerve ending signals a muscle to contract, and it is also the transmitter used by many autonomic nerves within the nervous system. Because its primary functional sites are the nerve endings and their target tissues—the muscles—the best description is that acetylcholine is found in nerves and muscles. If you picked just nerves or just muscles, you’d miss one essential end of the communication pathway, since acetylcholine operates at both the nerve terminal and the muscle endplate.

Acetylcholine is the chemical messenger released by cholinergic nerve endings to communicate with target cells. It mediates transmission at the neuromuscular junction, where a nerve ending signals a muscle to contract, and it is also the transmitter used by many autonomic nerves within the nervous system. Because its primary functional sites are the nerve endings and their target tissues—the muscles—the best description is that acetylcholine is found in nerves and muscles. If you picked just nerves or just muscles, you’d miss one essential end of the communication pathway, since acetylcholine operates at both the nerve terminal and the muscle endplate.