Control of Body Temperature

 

• Thermoregulatory centre in brain:  

  ◦ Monitors blood temperature  

  ◦ Receives signals from skin receptors

 

Too Hot → Cool Down  

• Blood vessels dilate (vasodilation) → more blood to skin → heat loss  

• Sweat glands active → sweat evaporates → cools body  

• No shivering

 

Too Cold → Warm Up  

• Blood vessels constrict (vasoconstriction) → less blood to skin → heat conserved  

• No sweat  

• Shivering → muscle contractions → heat generated