Body Temperature Flashcards
What’s the optimum temperature for the body?
37c
What detects the temperature of the blood and skin?
Thermoregulatory centre
How does the thermoregulatory system control body temperature ?
- receives impulses from temperature receptors in the skin
* contains receptors that are sensitive to blood temperature
How does the body respond when your too hot ?
- hairs lie flag
- sweat
- blood vessels dilate
How does the body respond when your too cold ?
- hairs stand up
- blood vessels constrict
- shiver
- no sweat
How does shivering warm you up?
Muscles contract
Requires respiration
Exothermic reaction
Releases heat
How do your hairs standing up warm you up?
Creates an insulation layer of air
How does sweating cool you down ?
The sweat must evaporated
Requires heat energy
Transfers energy to the environment
How does hairs laying flat cool u down?
Hair muscles relax
No respiration needed
How does vasodilation cool you down?
Blood flows close to the surface
Helps energy transfer to the energy
How does vasoconstriction warm you up?
Not as much energy can be transferred to the surroundings
Name the area of the brain that controls body temperature
Thermoregulatory centre
Explain why a person in a sauna is advised to drink water regularly
Skin temperature will increase so sweat glands will produce lots of sweat
Dunking water will help to restore the water balance in the body
Describe and explain the response of a sweat gland when a person is cold
Stop sweat production
Because sweat transfers energy to the surroundings when it evaporates
