Control of body temperature Flashcards
1
Q
What happens to the body when it gets too hot?
A
- Vasodilation
- Hairs lay flat
- Sweating
2
Q
What happens to the body when it gets too cold?
A
- Vasoconstriction
- Shivering
- Hairs stand in end
3
Q
What is vasoconstriction?
A
The constriction of blood vessels close to the surface of the skin
4
Q
What is vasodilation?
A
The opening/dilation of blood vessels close to the surface of the skin
5
Q
How does hairs standing on end help to prevent heat loss?
A
Traps a layer of air which can be used as an insulator for the body, preventing heat loss
6
Q
How does sweating cause the body to lose more heat?
A
evaporates removing heat energy from the skin
7
Q
How does shivering help the body maintain heat?
A
Rapid muscle contractions require energy from respiration and some of this is released as heat.
8
Q
What controls the bodies temperature?
A
The thermoregulatory system/centre
