Protein that is stored in a gland and secreted to an organ to restore the body to normal conditions?

The protein which is stored into gland and maintain the body normal condition by secretion of minute quantity is called Hormone.

Explanation:

Hormones:

These are known as the chemical messengers of the human body. They basically releases from the gland and travels into blood stream and enter into tissues or organs. They work with the time slowly but they act in various ways. They act in:

Metabolism (acquired energy from food) Growth and development Reproduction Sexual function Mood

The glands which produces hormones are called endocrine glands. Our body's endocrine glands are pituitary gland, thymus, pineal, adrenal glands, thyroid, testes (in men), and ovaries (in women). Even minute amount of hormones can change whole body. So, these hormones are most powerful.