How does hair on the skin surface keep us cool?

Lays flat so that a layer of air isn't trapped

How does sweat keep us cool?

As sweat evaporates it takes heat with it

Blood vessels near the surface widen

Blood vessels near the surface narrow

Blood vessels near the skin have widened

Blood vessels near the skin have narrowed

Test

juliacorbett 9 preguntas 4,7 (3 valoraciones)

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1What is thermoregulation?
1. AControl of body temperature
2. BControl of water in the body
3. CControl of glucose in the body
2Which part of the brain controls temperature?
1. ACortex
2. BHypothalamus
3. CCerebellum
3How does the brain sense the skin temperature?
1. AReceptor cells in the dermis
2. BHair on the skin surface
3. CLevels of sweat are picked up
4How does hair on the skin surface keep us cool?
1. AIt acts like a woolly jumper
2. BHair only keeps us warm
3. CLays flat so that a layer of air isn't trapped
5How does sweat keep us cool?
1. ASweat is cool so cools us down
2. BAs sweat evaporates it takes heat with it
3. CWe don't sweat when we are hot
6What is vasodilation?
1. ABlood vessels near the surface widen
2. BBlood vessels near the surface narrow
3. CBlood vessels move
7What is the effect of vasoconstriction?
1. AMore heat is lost
2. BLess heat is lost
3. CNo heat is lost
8What is the process called when the body makes small changes to return the temperature to normal?
1. APositive feedback
2. BRegulation
3. CNegative feedback
9Why do we go pink when we are hot?
1. ABlood vessels near the skin have widened
2. BBlood vessels near the skin have narrowed
3. CWe are bleeding