CHAPTER 31

CHAPTER 31 - November 7, 2011 CHAPTER 31 HOMEOSTASIS AND...

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November 7, 2011 CHAPTER 31 HOMEOSTASIS AND THE ORGANIZATION OF THE ANIMAL BODY Homeostasis Tendency of living things to try to maintain their structure and regulate their internal environment. Everybody is doing this right now. The minute you stop doing this is the minute where you start to decompose. Every single unicellular cell in your body has to do this. 1.) Negative feedback: a change in one direction causes a series of events in the other direction to counteract the change. o Examples Biological: body temp of 37 degrees C (97.6 F) Your body works just like a thermostat. When you get hot you sweat and it brings your body temperature back down. If you get cold you start shivering and your muscles start to move and then your temperature will go back up. Hypothalamus: the control center of your brain. The hypothalamus gets a signal saying you are cold and sends your nerves a signal to shiver. Sugar concentrations in your blood. Salt concentration
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This note was uploaded on 01/19/2012 for the course BIO 1002 taught by Professor Hrinchevich during the Fall '10 term at LSU.

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CHAPTER 31 - November 7, 2011 CHAPTER 31 HOMEOSTASIS AND...

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