Homeostasis - Homeostasis need for homeostasis constancy of...

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Homeostasis need for homeostasis - constancy of internal environment controlled through negative feedback loop sensors - measure conditions of internal environment integrating center - contains set point (proper conditions) change occurs >> effectors told to increase/decrease activity o effectors - muscles/glands body temperature - set around 37 C o hypothalamus detects temperature changes o high temperature >> sweating, dilation of blood vessels o low temperature >> shivering, constriction of blood vessels o ectothermic (cold-blooded) animals use behavior, environment to control internal conditions glucose levels - controlled by islets of Langerhans o insulin secreted >> stimulates reuptake of blood glucose in tissues antagonistic effectors - push-pull relationship o sets of effectors used to better control homeostasis positive feedback loops - drives condition further from set point o don’t help maintain homeostasis o used in blood clotting, uterus contractions
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Homeostasis - Homeostasis need for homeostasis constancy of...

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