The chemical messengers, manufactured and secreted by the endocrine glands, that regulate metabolism and influence body growth, mood, and sexual characteristics.

Chemicals made by certain glands and tissues in the body, often in response to signals from the pituitary gland or the adrenal gland. Hormones have specific effects on specific target organs and tissu [..]

Chemicals that cause changes in our bodies and influence how glands and organs work.

Naturally occurring chemicals that guide the changes that take place in the body. As well as causing physical changes, hormones cause emotional changes too. Hormones cause puberty to start in boys and [..]

mineralocorticoid

Okay, you all know a little something about hormones (are any of you teenagers?), but do you really know what they are? Well, hormones are chemical compounds secreted by the endocrine glands that are [..]

Chemicals produced by glands in the body and circulated in the bloodstream. Hormones control the actions of certain cells or organs.

Chemical "messengers" secreted by ductless endocrine glands directly into the blood, which in small amounts stimulate specific processes of metabolism in "target" organs or tissues, usually at a distance from their site of production and secretion.

Messenger substances synthesized in the body and secreted by the endocrine glands. Hormones regulate the digestive system, growth, hunger, thirst, blood glucose and cholesterol levels, fat burning and storage, absorption and excretion, internal clocks such as day and night cycles, menstrual cycles, and sex drive.

Chemical messengers that carry information from one part of an organism to another to regulate physiology and behaviour. 

A chemical that is made by one type of cell in the body and acts on another. Hormones act as messengers to tell the target cell to stop or start certain cellular processes.

substances that control growth and other functions in living organisms; artificial hormones may be administered to cattle to increase growth or milk production; see rGBH

Chemicals found naturally in animals' bodies that control processes like growth and metabolism. Synthetic (man-made) hormones have been developed for a number of purposes, including treatment of [..]

Powerful chemicals that affect many processes in the body, including sexual function, mood, and growth.

Naturally occurring substances made in the body which control the activity of normal cells. They include: follicle stimulating hormone, gonadotrophins, human chorionic gonadotrophin, luteinising hormo [..]

Substances secreted by various organs of the body that regulate growth, metabolism, and reproduction.

Hormones are special chemicals your body makes to help it do certain things – like grow up! Hormones are important when you start to go through puberty, which is when you begin developing into an adul [..]

Proteins produced by the endocrine glands of the body, such as the thyroid gland and the pancreas. Hormones are released directly into the bloodstream and cause specific effects on cells and organs in distant locations in the body. | ↑ Back to Top

Chemical substances having a specific regulatory effect on the activity of a certain organ or organs. The term was originally applied to substances secreted by various Endocrine Glands and transported [..]

Hormones secreted by the Adenohypophysis (Pituitary Gland, Anterior). Structurally, they include polypeptide, protein, and Glycoprotein molecules.

Hormones released from Neoplasms or from other Cells that are not the usual sources of Hormones.

Hormones secreted by the gastrointestinal Mucosa that Affect the timing or the quality of Secretion of digestive Enzymes, and regulate the Motor Activity of the Digestive System organs.

Hormones produced by the Gonads, including both steroid and Peptide Hormones. The major steroid Hormones include Estradiol and Progesterone from the Ovary, and Testosterone from the Testis. The major [..]

Peptide Hormones produced by Neurons of various regions in the Hypothalamus. They are released into the pituitary portal circulation to stimulate or inhibit Pituitary Gland functions. Vasopressin and [..]

Hormones secreted by Insects. They influence their Growth and Development. Also synthetic substances that act like Insect Hormones.

Hormones produced by Invertebrates, usually Insects, Mollusks, annelids, and Helminths.

Compounds, either natural or synthetic, which block development of the growing Insect.

Endogenous chemicals that regulate the Water-Electrolyte Balance in the body, such as the Natriuretic Peptides.

Peptide Hormones secreted into the Blood by Cells in the Islets of Langerhans of the Pancreas. The alpha Cells secrete Glucagon; the beta Cells secrete Insulin; the delta Cells secrete Somatostatin; a [..]

Hormones synthesized from Amino Acids. They are distinguished from Intercellular Signaling Peptides and Proteins in that their actions are systemic.

Hormones secreted by the Pituitary Gland including those from the anterior lobe (Adenohypophysis), the posterior lobe (Neurohypophysis), and the ill-defined intermediate lobe. Structurally, they inclu [..]

Peptides, natural or synthetic, that stimulate the release of Pituitary Hormones. They were first isolated from the extracts of the Hypothalamus; Median Eminence; PITUITARY STALK; and Neurohypophysis. [..]

Hormones produced by the Placenta include Chorionic Gonadotropin, and Placental Lactogen as well as Steroids (Estrogens; Progesterone), and Neuropeptide Hormones similar to those found in the Hypothal [..]

Any of the Hormones produced naturally in Plants and active in controlling Growth and other functions. There are three primary classes: Auxins, Cytokinins, and Gibberellins.

Steroid Hormones produced by the Gonads. They stimulate reproductive organs, Germ Cell maturation, and the secondary Sex Characteristics in the males and the females. The major sex steroid Hormones in [..]

A collective grouping for both naturally occurring and synthetic Hormones, substitutes, and antagonists.

Hormones produced in the Testis.

Humoral factors secreted by the Thymus Gland. They participate in the development of the lymphoid system and the maturation of the cellular immune response.

Natural Hormones secreted by the Thyroid Gland, such as Thyroxine, and their synthetic analogs.

Chemical substances having a specific regulatory effect on the activity of a certain organ or organs. The term was originally applied to substances secreted by various ENDOCRINE GLANDS and transported [..]

Hormones released from neoplasms or from other cells that are not the usual sources of hormones.

A collective grouping for both naturally occurring and synthetic hormones, substitutes, and antagonists.

Chemical messengers produced in various organs of the body that regulate growth and reproduction.

 Chemical messengers secreted by endocrine glands to regulate the activity of target cells. They play a role in sexual development, calcium and bone metabolism, growth and many other activities. 

Chemical substances secreted by a variety of body organs that are carried by the bloodstream and usually influence cells some distance from the source of production. Hormones signal certain enzymes to perform their functions and, in this way, regulate such body functions as blood sugar levels, insulin levels, the menstrual cycle, and growth. These [..]

A chemical released by a cell or a gland in one part of the body that sends out messages that affect cells in other parts of the organism. Only a small amount of hormone is required to alter cell metabolism. In essence, it is a chemical messenger that transports a signal from one cell to another.

The use of medication or surgery to prevent cancer cells from getting the hormones needed to grow.

Chemical messengers secreted by endocrine glands to regulate the activity of target cells. They play a role in sexual development, calcium and bone metabolism, growth, and many other activities.

Chemicals that a body makes to help other organs do their job.

Substances which have specific effects on the way the body works. Made in very small amounts by a gland, various hormones help to control growth, metabolism and reproduction. They are distributed in t [..]

Proteins produced by organs of the body that trigger activity in other locations. 

Chemicals in the blood which have a messenger function within the body. They are produced by cells of an endocrine gland or by nerve cells in response to a specific nervous or chemical stimulus. They affect the metabolic function of those cells that have the appropriate receptor for the hormone.

are messengers that our body's cells, tissues, and organs use as a means to communicate with each other.

Chemical substances that control and regulate the activity of certain cells or organs; see also: sex hormones.

See how well you know the names, roles and functions of different hormones active in the human body. (14 questions).

Hormones are among the most sophisticated and complex chemicals our human bodies manufacture. Hormones are naturally occurring chemicals and produced by the body in various different glands. Their job [..]

Hormones are chemicals released by cells that affect cells in other parts of the body. There are a group of Ménière’s sufferers who report an in increase in symptoms around menstruation. In a recent s [..]

Hormones are chemicals that carry messages from organs within your body to your cells. They tell the cells what to do. Glands such as the pituitary, thyroid,...

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Natural substances released by an organ that can influence the function of other organs in the body. Hypertrophic cardiomyopathy

Naturally occurring substances in the body that control the growth or activity of cells in the body.

Chemicals produced by various glands of the body that regulate the actions of certain cells or organs. Human leukocyte antigen (HLA) test

Chemicals produced by glands in the body. Hormones control the actions of certain cells or organs.

 Natural substances released by an organ that can influence the function of other organs in the body.

Chemicals in the body that send information between cells to bring about changes in the body.