Epinephrine (called adrenaline in non-US English speaking countries)
the thyroid gland
There is a hormone called epinephrine, also known as adrenalin. This may be what you are wondering about.
No, because instead of increasing true coordination, they create what is commonly called 'muscle memory', which enables the body to quickly react to a familiar scenario.
because it makes you react quickly by using fast twitch fibres in your body which makes your muscles react.
Insulin, produced by the pancreas, enables the body to take up and use glucose sugar from the blood. Diabetics have an inability to take up glucose from the blood and can have high blood sugar, which is easily fixed by administering insulin.
Cellular operations are altered by hormones, as the hormones that are produced by a body go together to either age a hormone quickly, or to stop the aging of the hormone altogether, essentially killing it.
Thyroid Hormone
The advanatage of agility training, is that you are training your muscles in your body to react quicker, so if in a game situation, and you need to dodge around a player, then your muscles can react quickly to work explosively to move from one point to another as quickly as possible.
Growth hormone affects the body growth. It is secreted by anterior pituitary.
target cells
The body's major metabolic hormone is called the thyroid hormone.
Adrenaline - it's the body's 'fight or flight' hormone.