PNB 2250 Lecture Notes - Lecture 13: Hashish, Strychnine, Digestion
10 Nov 2016
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Understand what nutrition is and how it varies among animals. Understand how differences in the metabolic rate (mr) affect animal development. Quantity: sufficient food for maintenance of homeostasis & growth. Energy to work against entropy: all food is ultimately oxidized. This is why we respire: food intake should equal energy needs. Availability is always an issue: regulated by. What is nutrition: not the number of calories but the type of calories. % of protein, lipids, sugars: non-caloric components. Energy levels: reptiles 0. 23 cal/g/hr, mammals 0. 37 cal/g/hr, birds 0. 4 cal/g/hr, caloric requirements vary. So must food consumption: associated costs. Digestion & reabsorption consumes between 12 and 25% of oxygen consumption in animals. A(cid:374)i(cid:373)als do(cid:374)"t store protei(cid:374)s or amino acids. + all animals must deal with amine groups. All animals need protein in their diets: proteins are normally recycled and replaced. Week 5 lecture 13 nutrition friday 9/30/16: all essential amino acids are common to all animals.
