Thermoregulation

Question 1

What does homeostasis do?

Answer 1

Keeps the bodies internal conditions relatively constant

Question 2

What is normal human body temperature

Answer 2

37

Question 3

Where is body temperature monitored and controlled?

Answer 3

The brain

Question 4

What part of the brain controls body temperature

Answer 4

Thermoregulatory center

Question 5

What does the thermoregulatory center contain

Answer 5

Receptors which are sensitive to the temperature of the blood

Question 6

What does the skin contain (to do with temperature)

Answer 6

Contains temperature receptors which send electrical impulses down Neurons to the thermoregulatory center

Question 7

What can cause the body temperature to increase

Answer 7

Exercise

Question 8

When the body temperature is too high what happens

Answer 8

Sweat gland- release sweat onto the surface of the skin. The sweat then evaporates and this takes energy from the body cooling the body down
Flushing- the blood vessels suppling the capillaries dilate (vasodilation) this means more blood flows through the capillaries. Heat transfers out of the blood

Question 9

What happens if the body temperature is too low

Answer 9

The blood vessels supplying the capillaries constrict (vasoconstriction). Less blood now flows through the capillaries and heat is lost from the body.
Shivering - skeletal muscle contract. To generate energy for this the muscle cells increase rate of respiration. This releases heat which warms the body
Stop sweating

Question 10

What does the body do when temperature is too high or low

Answer 10

The thermoregulatory center detected the change from the normal value. The body responds to reverse this change and restore normal body temperature

Question 11

Explain why more water was lost by breathing during a race

Answer 11

More energy needed more respiration increase breathing rate

Question 12

Explain my more water was lost to the skin during a race

Answer 12

More sweating needed to cool down the body