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1 Found helpful • 9 Pages • Topic Notes • Year: Pre-2021
Homeostasis: The body’s ability to maintain relatively stable internal conditions even though the outside environment is continually changing Most cells exist in internal environment composed of blood and tissue fluid internal environment must be kept constant as cells operate within narrow limits of temp, pressure, acidity, or concentration (controlled to enable efficient rate of chemical reactions) body must detects and communicate changes in environment to structures that will respond to the correct balance (flow of info using endocrine or nervous system) Negative feedback system: Negative feedback: effector produces opposite effect of stimulus (corrects) e.g. body temp and blood glucose levels Positive feedback: effector produces a response in same direction as stimulus (one directional)
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