Negative Feedback

Negative Feedback

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  • Negative Feedback: Body Temperature
  • I should go for a run today.
  • It's a bit hot.
  • Just keep going!
  • Amira is thinking of going for a run today. Her body temperature is balanced.
  • I'm sweating so much.
  • While running outside, she notices that it's hot. As she runs, her body heat increases-stimulus- so then the Receptor detects the change, and responds to the stimuli. In the Receptor, temperature sensors in skin and cells of thermoregulatory center in brain.
  • Still running her body heat has increased more, and she starts to feel it. The Receptor sends the information along the afferent pathway to the control center,-where it determines the appropriate response- and the information is sent along the efferent pathway to the effector.
  • I feel better now! Home Sweet Home!
  • Amira starts sweating a lot. In the Effectors, the sweat glands increase secretion, and the blood vessels in the skin dilate. 
  • Since she started sweating, she feels better. She even started walking, which made the cooling process better for her. This response causes the body temperature to decrease through evaporation and radiation. Stimuli ends here.
  • My body is cooling off. Good thing I started walking.
  • Even though she stopped sweating, she still feels sweaty, but now she feels that her body is no longer hot. The body's normal temperature is restored, so there is Homeostasis.
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