PHYL 1010Y Lecture Notes - Lecture 1: Sodium-Glucose Transport Proteins, Monoglyceride, Osmotic Concentration
18 Apr 2015
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Identify main function of the gi system: to move nutrients, water and electrolytes from the external environment into the body"s internal environment, rids the body of indigestible products. Ingest food - transfer as much nutrients, water & minerals from food into the internal environment - excrete leftovers - protect internal environment from invaders. Occur in some smooth muscle sphincters and in the anterior portion of stomach. Explain relationship between basic electrical rhythm, interstitial cells of cajal, slow wave potentials and phasic contractions: intestinal muscle exhibits spontaneous slow wave potentials. Describe the chewing reflex: chewing: begins mechanical digestion, voluntary control of jaw & mouth, reflex - presence of food in mouth, tongue forms food bolus, pushes to back of mouth. Describe gastric motility and its control secretion to aid digestion and bring contents in contact with absorptive epithelia. Gastric motility moves luminal contents along the tract, mix contents with. Describe segmentation contractions of the small intestine and their regulation.
