This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Nerve fibres innervating sweat glands release the following at their ending 
Select and explain. 
A. Noradrenaline, B. Acetycholine, C. Dopamine, D. Histamine
B: Acetycholine
Answer: B: Acetycholine 
Explanation: Nerve fibres innervating sweat glands are cholinergic.Ref: Ganong&;s review of medical physiology 23rd edition Page no: 267