MB ChB Year 1: Nutrition and Energy

Lecture 9: Digestion & Absorption (1)

Dr Malcolm Hunter

Elementary chemical structures of the main dietary foodstuffs (carbohydrates, fats and proteins) and their break down by digestive enzymes; sources of the digestive enzymes, secreted and brush border; mechanisms of absorption; coupled transport of monosaccharides and amino acids with sodium; facilitated diffusion of some monosaccharides; passive diffusion of monoglycerides, fatty acids and D-amino acids; emulsification and micelle formation in the duodenal lumen; unidirectional secretory and absorptive fluxes; calcium, iron and vitamin B12 handling; colon electrolyte handling and modulation by mineralocorticoids.

Dr Hunter's Powerpoint presentations are available on the VLE

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