Body Temperature

Question 1

What’s the optimum temperature for the body?

Answer 1

37c

Question 2

What detects the temperature of the blood and skin?

Answer 2

Thermoregulatory centre

Question 3

How does the thermoregulatory system control body temperature ?

Answer 3

• receives impulses from temperature receptors in the skin

* contains receptors that are sensitive to blood temperature

Question 4

How does the body respond when your too hot ?

Answer 4

• hairs lie flag
• sweat
• blood vessels dilate

Question 5

How does the body respond when your too cold ?

Answer 5

• hairs stand up
• blood vessels constrict
• shiver
• no sweat

Question 6

How does shivering warm you up?

Answer 6

Muscles contract

Requires respiration

Exothermic reaction

Releases heat

Question 7

How do your hairs standing up warm you up?

Answer 7

Creates an insulation layer of air

Question 8

How does sweating cool you down ?

Answer 8

The sweat must evaporated

Requires heat energy

Transfers energy to the environment

Question 9

How does hairs laying flat cool u down?

Answer 9

Hair muscles relax

No respiration needed

Question 10

How does vasodilation cool you down?

Answer 10

Blood flows close to the surface

Helps energy transfer to the energy

Question 11

How does vasoconstriction warm you up?

Answer 11

Not as much energy can be transferred to the surroundings

Question 12

Name the area of the brain that controls body temperature

Answer 12

Thermoregulatory centre

Question 13

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

Answer 13

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

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

Question 14

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

Answer 14

Stop sweat production

Because sweat transfers energy to the surroundings when it evaporates