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  • Oof! I just tripped over the curb, and I think I scrapped my knee open
  • Oh no!
  • Oh man! It won't stop bleeding!
  • Hey! We just learned about this in anatomy class! 
  • Well what's happening with the cut right now?
  • Basically, the receptor right now is sending signals to the control center of the brain, alerting that something is wrong
  • Then what happens?
  • Once the signal reaches the brain through the afferent pathway, it then relays that message to the effector. It signals specifically for platelets to go to the cut
  • What do platelets have to do with it?
  • They stop the cut from bleeding after the signal goes through the efferent pathway! This is actually one of the few examples of a positive feedback loop!
  • A what?
  • A positive feedback loop is where the body amplifies the response until the signal is gone. With stopping a from bleeding, the brain signals for a ton of platelets to stop it from bleeding. 
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