Body Temperature

Question 1

What body system controls the body temp

Answer 1

nervous system

Question 2

What is the order of events in body temp controlling (i.e electrical impulse pathway)

Answer 2

stimuli –> sensory neurone –> CNS (spinal cord) –> relay neurone –> motor neurone –> effector

Question 3

What is the stimuli for body temperature

Answer 3

temperature of blood

Question 4

What detects the change in body temp

Answer 4

the hypothalamus in brain

Question 5

What happens to reduce body temperature when TOO HOT

Answer 5

heat released because skin receives electrical impulse from brain
- aterioles muscles relax to widen lumen and allow more blood to flow nearer to the surface of skin (VASODILATION)
-sweat glands produce sweat and water from sweat is heated by skin until it evaporates which takes heat energy away from body reducing overall temperature

Question 6

What happens to increase body temperature when TOO COLD

Answer 6

muscle contracts to extend hairs which traps air between outside and skin - air is a good insulator it reduces heat loss
arterioles muscles contract to reduce lumen width to allow less blood to flow nearer to surface of skin (VASOCONSTRICTION)
shivering = rapid muscle contractions to try keep body temp up

Question 7

How does sweat cool us down

Answer 7

thermal energy produced from body allows water from sweat to evaporate and transfer energy to environment.
Therefore reducing amount of energy in your body and lowers temp