Thermoregulation

Question 1

Thermoregulatory centre

Answer 1

In the brain as the hypothalamus
Contains receptors sensitive to temperature of blood

Question 2

Temperature receptors in skin

Answer 2

Send electrical impulses down sensory neurones to the brain (thermoregulatory centre)
So can detect if body temperature gets too high or low

Question 3

If temperature gets too high

Answer 3

Sweating
Vasodilation

Question 4

Sweating

Answer 4

Sweat glands release sweat onto surface of skin which evaporates = takes energy from body to cool down

Question 5

Flushing/ vasodilation

Answer 5

Blood capillaries under skin dilate/ get wider
More water enters the capillaries
Which can transfer out the blood through skin surface

Question 6

If body temperature gets too low

Answer 6

Vasoconstriction
Stop sweating
Shivering

Question 7

Vasoconstriction

Answer 7

Capillaries under skin get more narrow
Less blood can flow = less heat lost through surface of heat

Question 8

Shivering

Answer 8

Skeletal muscles contract
To get energy for this we require respiration
Which releases heat energy = warm