Definition:

Hormones are signaling molecules produced by glands in multicellular organisms, including humans.

Function:

Hormones act as chemical messengers, regulating various physiological processes and behavioral activities in the body.

Role:

They help coordinate and maintain homeostasis, growth, development, metabolism, reproduction, and response to external stimuli.

Types:

Hormones can be categorized into different types, including:

• Peptide Hormones: These are composed of amino acids and include insulin, oxytocin, and growth hormone.
• Steroid Hormones: These are derived from cholesterol and include testosterone, estrogen, and cortisol.
• Amino Acid Derivative Hormones: These are synthesized from amino acids and include epinephrine and melatonin.

Regulation:

Hormone secretion is controlled by complex feedback systems involving the hypothalamus, pituitary gland, and target organs.

Transportation:

Hormones are released into the bloodstream and carried to their target cells or organs through the circulatory system.