Physiology 1021 Study Guide - Quiz Guide: Digestion, Esophagus

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Basic function of the gut is to take in nutrients, break them down and absorb them. Does them through the 3 major functions of the gut: secretion ( 2 major types, exocrine - refers to hormones /out of body / endocrine-secreted into the blood stream, motility, absorption. Going to talk about endocrine / exocrine. Salivary glands ( primary digestion glands) - b/c they secrete an enzyme amylase - breaks down coh - starts in the mouth , only coh starts in the mouth. Hc03(bicarbonate)- neutralizes oral acids ( like a citrus fruit) , also neutralizes from oral bacteria , b/c lining of mouth is very susceptible to a low ph , and tooth enamel is also very susceptible to low ph. Enzyme work best at a neutral ph , amylase likes a ph around 6-7. Primary ducts converging to a main duct into the mouth. All these ducts converge eventually into one main duct.

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