AP 3.19 Lecture

kylerigonan's version from 2015-04-20 09:40



Question Answer
Defacationremoval of waste; whatever body cant use or too much of it will be removed as waste
what are submucosal nerve plexuscontrols secretions coming glands & contractions of muscularis mucosa
Nerve Plexus1) submucosal nerve plexus in submucosa controlling glands and muscularis mucosa 2) myenteric nerve plexus controls muscularis externa
Enteric NS NS of GI Tract
Innervation of Enteric NSlinked to CNS via afferent visceral fibers
Role of the afferent visceral fibers send messages if full/empty (stretch receptors), chemicals... stretch and chemoreceptors in walls of organs then CNS via afferent visceral nerve fibers
sympathetic response to enteric NSdecreased activity at digestive organs
parasympathetic response to enteric NSincreased activity at digestive organs
function of salivacleanse mouth, moistens & disscolves food chemicals, food in solution, aids in bolus formation (mix of food and saliva), contains enzymes that breaks down starch
what cells makes salivaserous and mucus cells mixed
composition of saliva97-99.5% water, slight acidic (kill bacteria), electrolytes(salts), salivary amylase(only enzyme digest in mouth), lingual lipase
how is the mouth kept wet?intrinsic glands function to keep mouth at all times located in the inside lining of the tongue and mouth
when is extrinsic glands active?produces saliva when 1) eating food(chemoreceptors and stretch receptors are stimulated and msg sent to brain)..(2) parasymp fiber (from brain) to extrinsic glands via CN VII and IX to send impulses

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