hormone, secretory substance carried from one gland or organ of the body via the bloodstream to more or less specific tissues, where it exerts some influence upon the metabolism of ...

Hormones (from Greek ὁρμή - "impetus&qu ot;) are chemicals released by cells that affect cells in other parts of the body. Only a small amount of hormone is required to alter cell metabolism. It is also a chemical messenger that transports a signal from one cell to another. All multicellular organisms produce hormones; plant hormones are also called phytohormones.Hi erarchical nature ... · Hormone signaling · Interactions with ...

Online Medical Dictionary and glossary with medical definitions ... Definition of Hormone. Hormone: A chemical substance produced in the body that controls and regulates the ...

hormone ( ) n. A substance, usually a peptide or steroid, produced by one tissue and conveyed by the bloodstream to another to effect physiological

hormone /hor·mone/ (hor´mon) a chemical substance produced in the body which has a specific regulatory effect on the activity of certain cells or a certain organ or organs.hormo ...