BIOL 242 Study Guide - Midterm Guide: Allelopathy, External Intercostal Muscles, Branchial Arch
Document Summary
End of chapter 32, 33, 34, 40, 41, 42. Three kinds of nitrogenous waste: ammonia, uric acid, and urea. Excretion: not suitable for land animals, invertebrates use whole body, bony fish use gills and kidneys. Seen in insects, land snails, reptiles, and birds. Production takes place in vertebrates in the liver. Seen in mammals, most amphibians, sharks, and some boney fish. Diverse excretory systems are variations on a tubular theme. Essential nutrients- nutrients that can not be made by the body, must be obtained from food. Excess glucose: stored as glycogen in liver and muscles, stored as fat in adipose (triglycerides) Essential nutrients- things the body cannot synthesize itself so has to come from food. Fatty acids- unsaturated: linoleic acid- omega-6, linolenic acid- omega-3. Both required for health of cell membranes: vitamins- organic molecules that the body needs in small amounts that it can reuse.
