PSYC 280 Chapter Notes - Chapter 9: Homeostasis, Emic And Etic, Extracellular Fluid
29 Nov 2014
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Species that make own heat from the inside of the body, using metabolism and muscular activity. Allows muscles to work hard for longer periods of time. Animals getting heat from outside of the body, from the environment. Need to stay near heat sources ectotherms. Homeostatic mechanisms that regulate temperature, bodily fluids, and metabolism = primarily negative feedback system deviation from a desired value (set point) trigger a compensatory action of the system. Restoring the desired value turns off the response. Similar to a thermostat there is generally a set zone rather than a set point. Redundancy is a feature of many homeostatic systems. Our bodies tend to have multiple mechanisms for monitoring our stores, conserving remaining supplies, lesion experiments showed that different hypothalamic sites control two separate thermoregulatory systems obtaining new resources, and shedding excesses. Homeostatic redundancy two different systems for regulating the same variable hierarchy of thermoregulatory circuits.
