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Physiology September 10.docx

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Department
Physiology
Course
Physiology 2130
Professor
Anita Woods
Semester
Spring

Description
Physiology September 10 1. Homeostasis 2. Negative Feedback Loops 3. Body Fluid Compartments 4. Cell Membrane Structure 1. – constantly interacting with the external environment Distinguish between external & internal environments of the body  respiratory system, digestive system, urinary system are constantly in contact with the environment Homeostasis = a similar condition; ability of the body to maintain a relatively constant internal environment Normal blood pH: 7.38 – 7.42 (may have diabetes if out of this range) 2. help maintain homeostasis At the gym, working out really hard, body temperature starts to rise, it will trigger an initial stimulus, a response will happen (sweat); a decreased stimulus will stop the initial stimulus and the loop shuts off. Set point 24 degrees Celsius  Control centre  effector (furnace)  controlled variable  sensor *control centre compares set point to value * effector  initial action ↘control center will turn OFF the effector ↘TURN OFF THE SYSTEM *thermostat in our body is the Hypothalamus (the brain) Figure 1.5 pg 7 *blood cells, capillaries, plasma is the first box *second box is inters
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