Unit 4.5 Feedback loops

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9 Terms

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homeostasis

maintenance of constant internal environment when the external environment changes

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negative feedback/feedback inhibition

loop that reduces or negates a stimulus

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positive feedback

loop that re-enforces a stimulus and leads to a greater response

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negative feedback loops maintain

variables (body temp, blood glucose, blood pH)

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set point

the range variables must be kept at.

  • Body temp: 37 degrees celcuis

  • blood glucose: 100 mg/dL

  • blood pH: 7

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sensor

detects fluctuations in a variable stimulus

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Control center/controller

generates a signal that triggers effectors to produce a response

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hypothalamus locaton

the brain

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hypothalamus function

sends signals to skeletal muscles