Hormones and Chemical Control
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| adrenal glands | one of a pair of ductless glands, located above the kidneys, consisting of a cortex, which produces steroidal hormones, and a medulla, which produces epinephrine and norepinephrine.
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| Adrenalin | a commercial form of this substance, extracted from the adrenal glands of sheep and cattle, or synthesized: used chiefly as a heart stimulant, to constrict the blood vessels, and to relax the bronchi in asthma
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| androgen | any substance, as testosterone or androsterone, that promotes male characteristics
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| auxin | a class of substances that in minute amounts regulate or modify the growth of plants, esp. root formation, bud growth, and fruit and leaf drop.
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| cortisone | a steroid hormone of the adrenal cortex, C21H28O5, active in carbohydrate and protein metabolism.
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| diabetes | any of several disorders characterized by increased urine production
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| digestive gland | any gland having ducts that pour secretions into the digestive tract, as the salivary glands, liver, and pancreas.
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| duct gland | gland that secretes its juice into a tube liadine directly into some organ
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| ductless gland | gland that secretes its juice directly into the blood
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| endocrine gland | any of various glands, as the thyroid, adrenal, and pituitary glands, that secrete certain substances or hormones directly into the blood or lymph; ductless gland.
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| endocrine system | the ductless glands and their hormones
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| estrogen | any of several major female sex hormones produced primarily by the ovarian follicles of female mammals, capable of inducing estrus, developing and maintaining secondary female sex characteristics, and preparing the uterus for the reception of a fertilized
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| gastrin | a hormone that stimulates the secretion of gastric juice.
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| growth hormone | any substance that stimulates or controls the growth of an organism, esp. a species-specific hormone, as the human hormone somatotropin, secreted by the anterior pituitary gland
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| hormones | any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues when transported to them by the body fluids.
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| hypothalamus | a region of the brain, between the thalamus and the midbrain, that functions as the main control center for the autonomic nervous system by regulating sleep cycles, body temperature, appetite
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| insulin | .a polypeptide hormone, produced by the beta cells of the islets of Langerhans of the pancreas, that regulates the metabolism of glucose and other nutrients
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| islet of Langerhans | any of several masses of endocrine cells in the pancreas that secrete insulin, somatostatin, and glucagon
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| melatonin | a hormone secreted by the pineal gland in inverse proportion to the amount of light received by the retina, important in the regulation of biorhythms: in amphibians, it causes a lightening of the skin
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| pancreas | a gland, situated near the stomach, that secretes a digestive fluid into the intestine through one or more ducts and also secretes the hormone insulin
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| parathormons | hormone produced by the parathyroid glands
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| parathyroid gland | any of several small oval glands usually lying near or embedded in the thyroid gland
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| pineal gland | a small, cone-shaped endocrine organ in the posterior forebrain, secreting melatonin and involved in biorhythms and gonadal development
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| pituitary gland | a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body
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| prolactin | an anterior pituitary polypeptide hormone that stimulates lactation by the mammary glands at parturition in mammals, the activity of the crop in birds, and in some mammalian species the production of progesterone by the corpus luteum
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| puberty | the period or age at which a person is first capable of sexual reproduction of offspring: in common law, presumed to be 14 years in the male and 12 years in the female
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| secretin | a polypeptide hormone, produced in the small intestine, that activates the pancreas to secrete pancreatic juice
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| sex glands | special glands that produce the sex cells and secrete the sex hormones; testes and ovaries
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| thymosin | a hormone, produced by the thymus gland, that promotes the development of T cells from stem cells
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| thymus gland | ductless gland located behind the breastbone
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| thyroid gland | a two-lobed endocrine gland, located at the base of the neck that secretes two hormones that regulate the rates of metabolism, growth, and development
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| thyroxin | the thyroid gland hormone that regulates the metabolic rate of the body.
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