ANP 1107 Lecture Notes - Lecture 7: Niacin, Keratin, Olive Oil

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1107
• Professor: Jacqueline Carnegie

Document Summary

1. 3 describe the region-specific digestive activities of the gi tract and their regulation. Outline the processes by which the various nutrients breakdown. Iron transported in blood bound to transferrin, but only if needed, otherwise lost when intestinal epithelial cells sloughed off: calcium absorption is related to blood levels of ionic calcium. Low plasma calcium triggers secretion of pth from parathyroid gland - pth triggers activation of vitamin d by kidneys, increasing uptake of calcium by the small intestine. Motility of large intestine: usually inactive; contractions sluggish & short-lived, haustral contractions are every ~30 min. Describe the digestive functions (& regulation) of the large intestine. Diarrhea: food residue passes too quickly for sufficient water reabsorption; prolonged diarrhea can lead to dehydration and electrolyte imbalances. Constipation: too much water absorbed & stool difficult to pass; e. g. lack of fibre, not heeding need to defecate, lack of exercise, laxative abuse, etc . 2. 1 review the metabolic pathways and their interactions.