aqa additional biology - homeostasis

homeostasis is how your body maintains its internal body temperature, 37oc.

if the body is cold, there are a number of things it will do to try and heat up:

• erection of hairs - this traps a layer of insulating air next to the skin
• shivering - respiration occurs, which makes the muscles move, which produces heat
• blood vessels near the surface of the skin get smaller (vasoconstriction) - so less blood goes near the surface, so less heat is given out

if the body is cold, there are things it does to try and cool down:

• sweating - as…