Digest1 - secretory activity Lumen of the alimentary canal...

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Digestive System - Basic Divisions • Alimentary Canal – Carries… Which organs? • Accessory Organs – Don’t carry… Which organs?
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Digestive Processes: Ingestion Where? Why? Voluntary?
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Digestive Processes: Propulsion Where? Why? • Deglutition • Peristalsis
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Digestive Processes: Mechanical Digestion Where? Why? What happens to surface area? • Chewing, churning, and segmentation
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Digestive Processes: Chemical Digestion • Enzymes Where? Why? • Hydrolysis
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Digestive Processes: Absorption Where? Why? Into what?
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Digestive Processes: Defecation Where? Why? • Feces
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External stimuli (sight, smell, taste, thought of food) Central nervous system and extrinsic autonomic nerves Afferent impulses Efferent impulses Long reflexes Internal (GI tract) stimuli Chemoreceptors, osmoreceptors, or mechanoreceptors Local (intrinsic) nerve plexus (“gut brain”) Effectors: Smooth muscle or glands Gastrointestinal wall (site of short reflexes) Response: Change in contractile or
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Unformatted text preview: secretory activity Lumen of the alimentary canal Short reflexes Digestive Stimuli and Control Parietal Peritoneum • Simple squamous epithelium over loose CT. • Lines the abdominal wall. • Retroperitoneal organs Visceral Peritoneum • Simple squamous epithelium over loose CT. • Intraperitoneal organs. Mesentery • Double layer of peritoneum • Function Peritoneal cavity • Potential space • Serous fluid. • How many abdominal organs does it contain? Composition of Saliva • 97-99% water • Electrolytes • Salivary amylase • IgA • Lysozyme • Mucin Functions of Saliva • Cleanses • Dissolves and moistens • Contains. • Fred ate some delicious patties made from rice, corn, and potatoes. He chewed them and savored every delicious bite. • Derrick ate the same patties but simply swallowed them whole. • Whose blood glucose levels will rise faster? Why? Esophagus...
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This note was uploaded on 11/10/2011 for the course LS 101 taught by Professor Abdul during the Spring '11 term at Montgomery College.

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Digest1 - secretory activity Lumen of the alimentary canal...

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