MCB3209Ch1%20Outline - ionic, pH, fluid composition]...

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1 MCB 3209 Chapter 1: Tissues, organs and systems; negative feedback and homeostasis pp. 6-21, esp. 6-9 and 20-21 Outline Intro to Physiology: How the body works Examples: slides Tissues in the body: similar cells performing one function Muscle, epithelium, nervous, connective tissues are all made up of one kind of cell, serve one function. Details will be presented later. Organs : multiple tissues performing one function Organ Systems : multiple organs performing similar function Negative feedback maintains (constancy) homeostasis through actions of tissues and organs Homeostasis: Constant internal environment, blood and fluids bathing the cells of the body. [Constant
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Unformatted text preview: ionic, pH, fluid composition] Different tissues and organs of the body all participate to help in this homeostasis. Negative feedback: change in a controlled variable through detection by a sensor, activation of an effector and response by an integrating center to return the controlled variable back to the original set point. . Example: [glucose], pancreatic beta and alpha cells, insulin+glucagon and muscle+liver+fat cells. Positive feedback is unstable and much less prominent in physiology...
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This note was uploaded on 09/13/2009 for the course MCB 57703 taught by Professor Machen during the Fall '08 term at University of California, Berkeley.

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