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Related Flashcards
Cards In This Set
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Chyme
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The semiliquid, partially digested food that travels through the intestinal tract.
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Peristalsis
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The muscular contractions that move food through the GI tract.
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The main function of bile is to....
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Emulsify fats
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The pancreas neutralizes stomach acid in the small intestine by secreting....
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Bile
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Which nutrient passes through the GI tract mostly undigested and unabsorbed?
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Fiber
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Absorption occurs primarily in the....
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Small intestine
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All blood leaving the GI tract traves first to the ....
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Liver
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Which nutrients leave the GI tract by way of the lymphatic system?
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Fats and fat-soluble vitamins
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Digestion and absorption are coordinated by the ....
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Hormonal system and the nervous system.
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Functions and Secretions of the GI Tract
MOUTH
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Function: Moisten and chew food
Secretion: None
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FUNCTIONS AND SECRETIONS OF THE GI TRACT
SALIVARY GLAND
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FUNCTION: Provides moisture, salivary amylase to begin starch breakdown
SECRETION: Saliva, salivary amylase, salivary lipase
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FUNCTIONS AND SECRETIONS OF THE GI TRACT
Esophagus
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FUNCTION: Vale #1; prevents food from going into the lungs
SECRETION: None
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FUNCTIONS AND SECRETIONS OF THE GI TRACT
Esophageal sphincter
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FUNCTION: Prevents stomach contents from backing up into the esophagus
SECRETIONS: None
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FUNCTIONS AND SECRETIONS OF THE GI TRACT
Stomach
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FUNCTION: Liquefies food; major protein digestion
SECRETION: HCL, gastric juices
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FUNCTIONS AND SECRETIONS OF THE GI TRACT
Pyloric sphincter
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FUNCTION: Valve #3; controls rate of stomach emptying
SECRETION: None
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