Body Temperature Flashcards Preview

Biology-homeostasis > Body Temperature > Flashcards

Flashcards in Body Temperature Deck (14)
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1
Q

What’s the optimum temperature for the body?

A

37c

2
Q

What detects the temperature of the blood and skin?

A

Thermoregulatory centre

3
Q

How does the thermoregulatory system control body temperature ?

A
  • receives impulses from temperature receptors in the skin

* contains receptors that are sensitive to blood temperature

4
Q

How does the body respond when your too hot ?

A
  • hairs lie flag
  • sweat
  • blood vessels dilate
5
Q

How does the body respond when your too cold ?

A
  • hairs stand up
  • blood vessels constrict
  • shiver
  • no sweat
6
Q

How does shivering warm you up?

A

Muscles contract

Requires respiration

Exothermic reaction

Releases heat

7
Q

How do your hairs standing up warm you up?

A

Creates an insulation layer of air

8
Q

How does sweating cool you down ?

A

The sweat must evaporated

Requires heat energy

Transfers energy to the environment

9
Q

How does hairs laying flat cool u down?

A

Hair muscles relax

No respiration needed

10
Q

How does vasodilation cool you down?

A

Blood flows close to the surface

Helps energy transfer to the energy

11
Q

How does vasoconstriction warm you up?

A

Not as much energy can be transferred to the surroundings

12
Q

Name the area of the brain that controls body temperature

A

Thermoregulatory centre

13
Q

Explain why a person in a sauna is advised to drink water regularly

A

Skin temperature will increase so sweat glands will produce lots of sweat

Dunking water will help to restore the water balance in the body

14
Q

Describe and explain the response of a sweat gland when a person is cold

A

Stop sweat production

Because sweat transfers energy to the surroundings when it evaporates