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November 13-ch31 - Water and salt levels o Glucose levels o...

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November 13, 2007 Chapter 31 Homeostasis Organization of the Animal Body Dynamic Constancy Cells of the animal body o Function only within a narrow range of acceptable states Homeostasis refers to the constancy of the body’s internal environment o Implies static, unchanging state Internal environment in a state of dynamic constancy o Body must maintain constant conditions o Actively adjusts to internal and external changes Homeostatic mechanisms regulate a variety of conditions in the fluids surrounding cells o Temperature o
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Unformatted text preview: Water and salt levels o Glucose levels o pH levels o oxygen and carbon dioxide levels in blood • Constancy of these conditions is required for o neuronal activity o muscle contraction o optimal enzyme activity for all metabolic reactions • Body Temperature regulation o Animals are groups according to source of body warmth Endoderms Ectoderms o Endotherms generate body heat through metabolic reactions o Maintain constant body temperature o Ectoderms derive body heat from environment o...
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