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At this point, receptors are sending afferent signals to the control center (brain) that inform it of their rising body temperature.
It sure is hot today!
Yeah, I can really feel the heat right now.
Now the control center has sent efferent signals to the effector (capillaries) causing them to dilate and increase the blood flow to the skin.
Really? It must be because of the heat.
Your face looks a little red.
Now the control center has sent efferent signals to the effector (sweat glands), causing them to secrete sweat to cool the body.
I'm starting to sweat, we should head inside.
Now that he has cooled down, his sweat glands have stopped secreting sweat, and his capillaries have began contracting to ease bloodflow to the skin.
I've stopped sweating now, i'm starting to cool off.
That makes sense, it's pretty cool in here.
As his body temperature lowers from the evaporation of sweat, and from the decreased bloodflow to his skin, his skin begins to appear pale.
Yeah, it's probably because i'm cooling down.
You look a little pale.
Finally, his body temperature returns to normal, and homeostasis is maintained. This is an example of a negative feedback loop.
I feel fine now!
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