What molecule do cells need? What is happening inside your body when you breath faster, and when your heart beats faster?

They need oxygen. Your body is breathing faster to provide itself with the proper amount of air it needs to functions. When your heart beats faster it is pumping the blood to carry the oxygen to your limbs to circulate the air needed there.

Explanation:

it's a common sense question think with coll head now there is the options for you - a) it's a wrong question b)in his dream c) he is dead d)sleeping during the night time

explanation:

the maintenance of fluid balance during exercise. author information: fluid supplementation is necessary for exercise in which fluid losses must be offset by intake to avoid the negative effects of hypohydration on health and performance.