chapter 1
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| What is homeostasis? | maintenance of a relatively stable internal environment
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| dynamic steady state | the changes that do occur are minimized by compensatory physiological changes
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| "dynamic" | each regulated factor marked by continuous change
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| "steady state" | changes don't deviate far from a constant or steady level
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| factors homeostatically regulated | temperature, concentration of nutrients, pH, concentration of O2 and CO2, volume and pressure, concentration of waste products, and concentration of water, salt and other electrolytes
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| internal environment | ECF; fluid that surrounds the cells and through which they make life sustaining changes
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| ECF | extracellular fluid; plasma and interstitial fluid
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| plasma | fluid portion of the blood
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| interstitial fluid | surrounds and bathes cells
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