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19 Cards in this Set
- Front
- Back
aka digestive tract
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alimentary canal
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Intracellular vs Extracellular digestion
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Intra: In cell, typically in membrane-bound vesicles
Extra: outside of the cell, in a lumen or tract |
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Food enters the body in the ____ and goes...
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oral cavity, pharynx, esophagus, stomach, small intestine, large intestine.
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Inner surface of epithelium is attached to underlying _______ by a ____
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connective tissue, basement membrane
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Two types of digestion
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mechanical vs chemical
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In the mouth, food is initially digested by...
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mastication expands the SA allowing enzymes to act faster, Salivary Amylase or ptyalin hydrolyzes starch into simple sugars. Toungue makes bolus...
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rhythmic wave of involuntary muscle contractions
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peristalsis
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The stomach is lined with ____ which is comprised of the _____ and ___ glands
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thick gastric mucosa; Pyloric and Gastric glands
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The gastric glands are stimmed by the _____
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brain which responds to the sight/taste/smell of foodies
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Compostion of the gastric glands
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Mucous (protects stomach lining); Chief (pepsinogen (aymogen of protein-hydrolyzing enzyme, breaks up certain peptide bonds); Parietal (secrete HCl);
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End Product of the Stomach
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The semi-fluid CHYME
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Regulates the Passage of food from the stomach to the small intestine
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Pyloric Sphincter
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Finishes the Process of Chemical Digestion
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Small Intestine
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Sections of the Small Intestine
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Duodenum, Jejunum, Ileum
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Where do the intestinal mucosa, pancreatic, gallbladder, and liver add their secretions?
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In the duodenum
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What does intestinal mucosa add?
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enzymes that hydrolyze carbs to monsaccharides (maltase,lastase, sucrase) and also hydrolyze proteins (peptidases)
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The duodenum itself secretes ___ in response to____
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Secretin in response to the acidity of chyme, which then stims the pancreas to release pancreatic juice. Also CCK (Cholecystokinin)in response to chyme
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The use of pnacreatic juice?
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Enzymes of small intestine desire a slightly basic pH, pancreatic juice has a high concentration of bicarbonates
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Pancreas Secretions?
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Pancreatic Juice, Trypsinogen (converts chymotrypsin), Chymotrypsin (cleaves sepcific peptide bonds in proteins)
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