Physiology 2130 Lecture Notes - Lecture 1: Extracellular Fluid, Control Variable, Thermostat
20 Sep 2016
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Document Summary
List the levels of organization in human body. Problem faced by body/cells: how to surround self with barriers that let waste out and desired substances in while maintaining internal environment. Physiology: the study of function in living organisms. Explores mechanisms by which organisms control their internal environments. Attempt to explain chemical and physical factors relating to. Internal environment: fluid surrounding cells of our body. External environment: region outside the body, including space and contents of digestive, respiratory and urogenital tracts. Homeostasis: the maintenance of relatively stable internal environment regardless of what is happening in the external environment. Homeostasis of body: also maintains internal environment through use of . Negative feedback control systems: contain set point, control center (integrator), effector, controlled variable and sensor (receptor) Ex. temperature in house drops below set point 20 degrees, sensor detects this change, sends signal to effector to produce more heat.
