BIOL 1080 Lecture Notes - Lecture 16: Carbohydrate, Intestinal Epithelium, Pancreatic Islets
5 Apr 2016
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Document Summary
Deficiency of nutrients and/or energy, adequacy of nutrients and/or energy, excess of nutrients and/or energy. Within 48 hr, food is processed in body and during this time the food must convert polymers and complex macromolecules into usable units and distribute them throughout body. Amino acids (protein), monosaccharides (carbs), fatty acids (fat or lipids), vitamins and minerals. There are essential, conditionally essential and non-essential nutrient chemicals in foods if deficient in essential nutrient its called nutritional deficiency disease. The cephalic phase of digestion and absorption chemical and mechanical digestion begins in mouth chewing: mastication paratoid gland, sublingual gland and submandibular gland salvuary secretion is under autonomic control (stim by sns & pns) Softens and lubricates food and provides enzymes (amylase & some lipase) All senses involved when preparing to eat which is proven by brain imaging large areas of the brain light up when we prepare to take our first bite of food.
