Final answer:
Acetylcholine is released from postganglionic parasympathetic, preganglionic parasympathetic, and postganglionic sympathetic nerves that project to sweat glands and blood vessels associated with skeletal muscles, except for sympathetic nerves supplying the adrenal medulla which release norepinephrine.
Step-by-step explanation:
Acetylcholine is the major transmitter released from ALL of the following EXCEPT:
- postganglionic sympathetic nerves
- sympathetic nerves supplying the adrenal medulla
- preganglionic parasympathetic nerves
- postganglionic parasympathetic nerves
- preganglionic sympathetic nerves
The correct answer is B. sympathetic nerves supplying the adrenal medulla.
These sympathetic nerves release norepinephrine, unlike the other options which release acetylcholine as the major transmitter.
Acetylcholine is released from postganglionic parasympathetic nerves, preganglionic parasympathetic nerves, and postganglionic sympathetic nerves that project to sweat glands and blood vessels associated with skeletal muscles.