However, the red-yellow pheomelanin is believed to cause the warm, golden, or auburn tones found in some types of brown hair. The range of colors produced by melanins is limited to shades of yellow, brown, red, and black. Grey hairs contain only a few melanin granules, spread out through the hair.
Hormones are your body's chemical messengers. They travel in your bloodstream to tissues or organs. Endocrine glands, which are special groups of cells, make hormones. The major endocrine glands are the pituitary, pineal, thymus, thyroid, adrenal glands, and pancreas. In addition, men produce hormones in their testes and women produce them in their ovaries.
A hormone is a chemical that your endocrine glands send throughout your body. Hormones (which can be protein or lipid in nature) affect your growth, puberty, metabolism, weigh â¦ t, figure, shape, physical appearance, reproductive behavior, and emotions.+ 53 others found this useful.Chaise Williams.ormones are a kind of biochemical messengers. Most hormones are chemical substances produced by specialized tissue formations called endocrine glands. The substances are secr â¦ eted directly into the bloodstream, other body fluids, or into adjacent tissues.