Physiology 2130 Study Guide - Midterm Guide: Fluid Compartments, Extracellular Fluid, Facilitated Diffusion
2 Feb 2016
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Document Summary
Physiology: the study of the normal functioning of a living organism and its parts. The cells in a multicellular organism play a critical roll in homeostasis of the organism as a whole. Homeostasis: the ability of the body to maintain a relatively constant internal environment. This is a dynamic, self-regulatory process involving all organs, tissues, and cells of the body. Negative feedback loop: change in variable triggers a response that drives the variable in the opposite direction. (ie) furnace in a house). Once the variable is back at set point the response will shut off. Set point to control center to effector to controlled variable to sensor back to control center. Extracellular= 33% (consists of interstitial plus plasma) Interstitial= about 26% cells are surrounded by extracellular fluid which serves to act as a transition between the external environment, and the intracellular fluid inside cells. Intracellular fluid: fluid inside of the cell, 67% of tbw ie cytoplasm.
