BIOL 1070 Study Guide - Quiz Guide: Arctic Ground Squirrel, Ectotherm, Blubber
27 Mar 2016
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In general, these animals have a thick layer of insulating blubber just under the skin. Animals that generate their own internal heat through metabolism are called endotherms (meaning inside heat ). For the most part, this is restricted to the so-called warm-blooded vertebrates that is, mammals and birds. Endotherms regulate body temperature (thermoregulation) ~37 c by sensing changes in internal temperature and altering physiological processes and behavior to bring internal temperatures back to normal. Therefore reptiles are not endotherms as they can"t maintain warm internal temperatures through metabolic processes. Unlike mammals and birds, ishes do not regulate their body temperatures internally, so they usually have the same internal temperature as the surrounding water. Animals such as ishes (and amphibians, reptiles, and invertebrates) that rely on environmental sources of heat are called ectotherms (meaning outside heat ). They typically can"t retain heat generated from metabolism.
