GENERAL HISTOLOGY

Detailed explanation-1: -The parasympathetic system turns up the flow of saliva by releasing a chemical, acetylcholine, which stimulates the glands to make more saliva.

Detailed explanation-2: -Salivation or saliva production by the submandibular, sublingual, and parotid glands is controlled by the activity of neurons of the salivatory nuclei located near the dorsal pontomedullary junction.

Detailed explanation-3: -The sympathetic system controls “fight-or-flight” responses. In other words, this system prepares the body for strenuous physical activity. The events that we would expect to occur within the body to allow this to happen do, in fact, occur. The parasympathetic system regulates “rest and digest” functions.

Detailed explanation-4: -The salivary glands are supplied by parasympathetic and sympathetic efferent nerves which travel to the glands by separate routes. Once in the glands the axons from each type of nerve intermingle and travel together in association with Schwann cells, forming Schwann-axon bundles.