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Homeostasis
chapter 1
Question | Answer |
---|---|
What is homeostasis? | maintenance of a relatively stable internal environment |
dynamic steady state | the changes that do occur are minimized by compensatory physiological changes |
"dynamic" | each regulated factor marked by continuous change |
"steady state" | changes don't deviate far from a constant or steady level |
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 |
internal environment | ECF; fluid that surrounds the cells and through which they make life sustaining changes |
ECF | extracellular fluid; plasma and interstitial fluid |
plasma | fluid portion of the blood |
interstitial fluid | surrounds and bathes cells |