What is thermoregulation?
Control of body temperature
Control of water in the body
Control of glucose in the body
Which part of the brain controls temperature?
Cortex
Hypothalamus
Cerebellum
How does the brain sense the skin temperature?
Receptor cells in the dermis
Hair on the skin surface
Levels of sweat are picked up
How does hair on the skin surface keep us cool?
It acts like a woolly jumper
Hair only keeps us warm
Lays flat so that a layer of air isn't trapped
How does sweat keep us cool?
Sweat is cool so cools us down
As sweat evaporates it takes heat with it
We don't sweat when we are hot
What is vasodilation?
Blood vessels near the surface widen
Blood vessels near the surface narrow
Blood vessels move
What is the effect of vasoconstriction?
More heat is lost
Less heat is lost
No heat is lost
What is the process called when the body makes small changes to return the temperature to normal?
Positive feedback
Regulation
Negative feedback
Why do we go pink when we are hot?
Blood vessels near the skin have widened
Blood vessels near the skin have narrowed
We are bleeding
