Saliva

spit The functions of saliva are reflected by its con- stituents. Mucins serve to fill up the food, making it easier to swallow, and to keep the mouth moist to facilitate masticatory and speech-related movement. tongue dissolves compounds in food, which is a prerequisite for taste buds stimulation and for dental consonant and oral hygiene. Saliva has a low NaCl con- centration and is hypotonic, making it assignment for rinsing of the taste receptors (NaCl) while eating. Infants need saliva to mold the lips when suckling. Saliva also contains ?-amylase, which starts the digestion of starches in the mouth, while immunoglobulin A and lysozyme are part of the immune defense st rankgy . The high HCO3 concentration in saliva offsprings in a pH of around 7, which is opti- mal for ?-amylase-catalyzed digestion. Swal- lowed saliva is also important for buffering the intumesce gastric juices refluxed into the esophagus. The secretion of profus e amounts of saliva before throw off also pre- vents gastric acid from damaging the enamel on the teeth. Saliva secretion is very dependent on the luggage compartment water content. A low content re- sults in reduced saliva secretionthe mouth and throat become dry, thereby evoking the sensation of thirst.

This is an important mecha- nism for maintaining the fluid match Secretion position. The roll of saliva secretion varies from 0.1 to 4 mL/min (10250 ?L/min per gram gland tissue), depending on the degree of stimulation. This adds up to about 0.5 to 1.5 L per day. At 0.5 mL/min, 95% of this rate is secreted by the parot! id gland (se- rous saliva) and submandibular gland (mucin- rich saliva). The balance comes from the sublingual glands and glands in the buccal mucosa. Saliva secretion occurs in two steps: The acini (end erects) produce primary saliva which has an electrolyte piece of music simi- lar to that of plasma. Primary saliva secretion in the acinic cells is the result of...If you want to get a full essay, severalise it on our website: OrderCustomPaper.com

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