thermoregulation

Question 1

what is the name for the part of the brain that controls body temperature

Answer 1

thermoregulatory centre

Question 2

what happens if body temperature is too high (sweat)

Answer 2

• sweat glands release sweat onto surface of the skin, sweat evaporates, taking energy from the body, cooling the body down

Question 3

what happens if body temperature is too high ( vaso)

Answer 3

• vasodilation, where blood vessels supplying the capillaries dilate, so more blood flows through the capillaries, helping heat transfer out of the blood so that the body temperature can return to its normal level

Question 4

what happens if body temperature is too low (shivering)

Answer 4

shivering makes our skeletal bones contract, to generate energy for this, muscle cells increase their rate of respiration, which releases heat to warm the body

Question 5

what happens if body temperature is too low (vaso)

Answer 5

• vasoconstriction
• blood vessels supplying the capillaries constrict
• meaning less blood now flows through the capillaries and less heat is lost from the body

Question 6

what temperature do enzymes in the body work best at

Answer 6

37 degrees

Question 7

where is the thermoregulatory centre located

Answer 7

in the hypothalamus

Question 8

what does the thermoregulatory centre contain

Answer 8

receptors that are sensitive to the temperature of blood

Question 9

what does the skin contain

Answer 9

temperature receptors which send electrical impulses down sensory neurones to the thermoregulatory centre