There is a hormone called epinephrine, also known as adrenalin. This may be what you are wondering about.
wot causes hyperness and how does the body react to it.
the thyroid gland
because it makes you react quickly by using fast twitch fibres in your body which makes your muscles react.
Your reflexes automatically make you react to things without you knowing it. You react to someone throwing something at you to protect your body.
Electric signals interpreted by your brain.
Human growth is a chemical change because the organs inside your body react with a substance (I don't know what substance, but I know it reacts with somthing in your body) in your body
for men testosterone, for women estrogen.
Hormones
Metals taken as micronutrients, in the body are dissolved in water; it is not a chemical reaction.
Epinephrine (called adrenaline in non-US English speaking countries)
A chemical reaction in their body causes them to "electricute" people.
pheromone