define hormone quizlet
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Endocrine system Define hormone. A chemical (protein, steroid or amine) produced by the endocrine gland that is transported via the blood to the body where it has the ability to effect all the bodily cells or target cells/organs.efine hypothalamus. Part of the brain that links the endocrine system and the nervous system and regulates the pituitary gland whilst regulating basic functions of the body; temperature, water balance, food intake and controls/intigrates the autonomic nervous system.
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Print Options Hormones are long-distance chemical signals that are secreted by the cells to the extracellular fluid and regulate the metabolic functions of other cells. Most hormones are amino acid based, but gonadal and adrenocortical hormones are steroids, derived from cholesterol.
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- Estrogen: A female steroid hormone that is produced by the ovaries and, in lesser amounts, by the adrenal cortex, placenta, and male testes. Estrogen helps control and guide sexual development, including the physical changes associated with puberty.
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hormone 1. a. A substance, usually a peptide or steroid, produced by one tissue and conveyed by the bloodstream to another to effect physiological activity, such as growth or metabolism. b. A synthetic compound that acts like a hormone in the body.
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hormone Hormones also include the endorphins, androgens, and estrogens. See more at endocrine gland. A substance that is synthesized by a plant part and acts to control or regulate the growth and development of the plant.
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The Endocrine System Hormones are chemical substances that are secreted by organs or by cells of organs in one part of the body and are carried by the bloodstream to other organs or tissues, where they control or regulate the development or function of those structures.
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- A hormone (from Greek ὁρμή, impetus) is any member of a class of signaling molecules produced by glands in multicellular organisms that are transported by the circulatory system to target distant organs to regulate physiology and behaviour. Eicosanoids – hormones derive from lipids such as arachidonic acid, lipoxins and prostaglandins. 2  Steroid – Examples of steroid hormones include the sex hormones estradiol and testosterone as well as the stress hormone cortisol.
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- They are a means of communication between cells. The endocrine system produces hormones that are instrumental in maintaining homeostasis and regulating reproduction and development. A hormone is a chemical messenger produced by a cell that effects specific change in the cellular activity of other cells (target cells).
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What is another word for hormone? (... is a kind of hormone) any of several hormones produced in the hypothalamus and carried by a vein to the anterior pituitary gland where they stimulate the release of anterior pituitary hormones; each of these hormones causes the anterior pituitary to secrete a specific hormone
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Hormones General characteristics of hormones are as follows:Hormones are secreted by endocrine cells. Hormones are chemical messengers.The are chemical signals that circulate in the body fluids. The hormones regulate the behavior of the target cells. Hormones, unlike enzymes do not catalyze any reaction.
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Medical Definition of Hormone Hormone: A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland.Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.Many hormones, such as neurotransmitters, are active in more than one physical process.ormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control. Many hormones, such as neurotransmitters, are active in more than one physical process.
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- Related Textbooks: 1  Define hormone. 2  Chemical messengers which are released into the blood to be transported throughout the body. 3  An (Endocrine/Exocrine) gland is a ductless gland that empties its hormones into the extracellular fluid, from which it enters the blood. 4  Endocrine glands. These glands do not have ducts.
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Hormone Function (all) The basic function of all hormones in the human body. Learn with flashcards, games, and more — for free.
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Hormone Etymology: Gk, hormaein, to set in motion. a complex chemical substance produced in one part or organ of the body that initiates or regulates the activity of an organ or a group of cells in another part. Hormones secreted by the endocrine glands are carried through the bloodstream to the target organ.
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Hormone Function (main hormones) Testosterone. The male sex hormone produced by the testes which promotes the maturation of the reproductive system, development of the male secondary sex characteristics, and is responsible for sexual drive (libido).
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Definitions &Translations Hormone (n.) (Physiological Chem.) a chemical substance, whether natural or synthetic, that functions like a hormone in a living organism. Thus, synthetic steroid hormones may be more effective than their natural counterparts. Hormone (n.) (Bot.) A substance that controls growth rate or differentiation in plants; also called phytohormone.
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Hormone Hormones have diverse chemical structures including eicosanoids, steroids, amino acid derivatives, peptides, and proteins. The glands that secrete hormones comprise the endocrine signaling system.ormones affect distant cells by binding to specific receptor proteins in the target cell resulting in a change in cell function. When a hormone binds to the receptor, it results in the activation of a signal transduction pathway.
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- Define hormone. Chemical substance which has a specific regulatory affect on certain cells, organ or organs. chemical messengers employed by the endocrine system which are released into the blood to be transported throughout the body.
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- Hormone definition, Biochemistry. 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. Pharmacology. a synthetic substance used in medicine to act like such a compound when introduced into the body.
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Hormones - Anatomy & Physiology Hormones are signalling molecules produced by endocrine cells which convey information to target cells. When a hormone reaches a target cell, it binds to a receptor to initiate a response. Hormones can be classified by various means, including by their structure and function. Traditionally there are three classifications of hormones: Classical Hormones: secreted from endocrine cells directly into interstitial fluid. These diffuse into the bloodstream to be distributed to all parts of the body served by the circulatory system.
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The Definition of the Protein Hormone The Definition of the Protein Hormone. The insulin you release after eating is a protein-based hormone. Photo Credit sandwich image by e-pyton from Fotolia.com. Hormones are molecules that your body uses for communication, often between organs in different organ systems or over long distances in the body.There are two major types of hormones: steroid hormones and protein, or peptide, hormones. hormone is a molecule that a group of cells releases into the bloodstream. The hormone then travels throughout the body, explains Dr. Lauralee Sherwood in her book Human Physiology, and is sensed only by target cells with receptors.
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BTA 25: Hormones A chemical that serves as a messenger; it is secreted by a gland and travels through the blood to one or more target organs, where it brings about responses. hormones that are made from cholesterol and are therefore lipid soluble (hydrophobic) and able diffuse into the cell through simple diffusion. They either bind to intracellular receptors in their target cells go into the nucleus of the cell and affect gene expression.
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Medical Definition of Hormone Medical Definition of Hormone. Hormone: A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.
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growth hormone A protein hormone of the anterior lobe of the pituitary, produced by the acidophil cells, which promotes body growth, fat mobilization, and inhibition of glucose utilization; diabetogenic when present in excess; a deficiency of somatotropin is associated with a number of types of dwarfism.
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- Medical Definition of STEROID HORMONE. : any of numerous hormones (as estrogen, testosterone, cortisone, and aldosterone) having the characteristic ring structure of steroids and formed in the body from cholesterol. What made you want to look up steroid hormone?edical Definition of STEROID HORMONE. : any of numerous hormones (as estrogen, testosterone, cortisone, and aldosterone) having the characteristic ring structure of steroids and formed in the body from cholesterol. What made you want to look up steroid hormone?