what is a hormone gcse
A hormone is a chemical substance which helps regulate processes in the body. Hormones are always secreted by glands and travel in the bloodstream.Hormones are usually for one organ (often called the 'target organ').A Hormone can also be described as a chemical 'messenger'. hormone is a chemical substance which helps regulate processes in the body. Hormones are always secreted by glands and travel in the bloodstream. Hormones are usually for one organ (often called the 'target organ'). A Hormone can also be described as a chemical 'messenger'.