pit receptors definition biology
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- Cell biology The reduction of a cell’s response to a hormone or other ligand by internalizing its cognate receptor and degrading it within a coated pit; downregulation is a mechanism by which receptors respond to an excess of ligands.
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receptor Medical Definition of receptor. 1  1: a cell or group of cells that receives stimuli : sense organ. 2  2: a chemical group or molecule (as a protein) on the cell surface or in the cell interior that has an affinity for a specific chemical group, molecule, or virus.
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Receptor (biochemistry) 3. Secondary Messengers. These are examples of membrane receptors. In biochemistry and pharmacology, a receptor is a protein molecule usually found embedded within the plasma membrane surface of a cell that receives chemical signals from outside the cell.
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pain receptor pain receptor, any one of the many free nerve endings throughout the body that warn of potentially harmful changes in the environment, such as excessive pressure or temperature.hey also appear in the stratified squamous epithelium of the cornea, in the root sheaths and the papillae of the hairs, and around the bodies of sudoriferous glands. The terminal ends of pain receptors consist of unmyelinated nerve fibers that often anastomose into small knobs between the epithelial cells.
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Understanding Hormone Receptors and What They Do Cell receptors, including hormone receptors, are special proteins found within and on the surface of certain cells throughout the body, including breast cells. These receptor proteins are the “eyes” and “ears” of the cells, receiving messages from substances in the bloodstream and then telling the cells what to do.In other words, the receptors act like an on-off switch for a particular activity in the cell.hese receptor proteins are the “eyes” and “ears” of the cells, receiving messages from substances in the bloodstream and then telling the cells what to do. In other words, the receptors act like an on-off switch for a particular activity in the cell.
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- Receptor: 1. In cell biology, a structure on the surface of a cell (or inside a cell) that selectively receives and binds a specific substance.
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- : any of a group of receptors that are present on cell surfaces of some effector organs and tissues innervated by the sympathetic nervous system and that mediate certain physiological responses (as vasodilation, relaxation of bronchial and uterine smooth muscle, and increased heart rate) when bound by specific adrenergic agents — compare ...
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- Receptor: 1. In cell biology, a structure on the surface of a cell (or inside a cell) that selectively receives and binds a specific substance. There are many receptors.
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Receptor Biology: Steven M. Sine Overview. Receptors are nature's transducers—they detect circulating hormones or substances released by nerve activity and elicit a biological response. Our research centers on specialized types of receptors called synaptic receptors, found on the surfaces of cells in close proximity to nerve terminals.
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Estrogen receptor Estrogen receptor. Estrogen receptors (ERs) are a group of proteins found inside and on cells. They are receptors that are activated by the hormone estrogen (17β-estradiol).
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Sensory Perception Sensory Receptors. Stimuli in the environment activate specialized receptor cells in the peripheral nervous system. Different types of stimuli are sensed by different types of receptor cells. Receptor cells can be classified into types on the basis of three different criteria: cell type, position, and function.Receptors can be classified structurally on the basis of cell type and their position in relation to stimuli they sense. third classification of receptors is by how the receptor transduces stimuli into membrane potential changes. Stimuli are of three general types. Some stimuli are ions and macromolecules that affect transmembrane receptor proteins when these chemicals diffuse across the cell membrane.
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TLR Any of the cell membrane proteins or intracellular proteins that react with chemicals, e.g., hormones, circulating in the cell's environment. The reaction triggers the cell's characteristic response to the hormone or other chemical. See: drug receptor.
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How to Decrease Road Noise in Your Backyard Fences. Masonry walls, such as brick, concrete or stone, are ideal for blocking out sound, but a solid wood fence can also be effective. The material you use is not as important as how you build the fence.
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Human Physiology/Print Version Summary. This gene encodes a member of the neurotrophic tyrosine kinase receptor (NTKR) family. This kinase is a membrane-bound receptor that, upon neurotrophin binding, phosphorylates itself and members of the MAPK pathway.The presence of this kinase leads to cell differentiation and may play a role in specifying sensory neuron subtypes.Mutations in this gene have been associated with congenital insensitivity to pain, anhidrosis, self-mutilating behavior, mental retardation and cancer. Congenital insensitivity to pain with anhidrosis (CIPA) is an autosomal recessive disorder caused by mutations in the neurotrophic tyrosine receptor kinase 1 (NTRK1) gene which encodes the receptor for nerve growth factor (NGF).
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Medical Definition of TSH receptor TSH receptor: The receptor for thyroid stimulating hormone (TSH), which is also called thyrotropin. Encoded by a gene on chromosome 14q, TSHR is largest of all known glycoprotein hormone receptors. It is one of the primary antigens in autoimmune thyroid disease.
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How to find the health insurance plan thatâs right for you Here are some important things to consider when choosing a plan: 1  Plan category: There are 5 categories of Marketplace insurance plans: Bronze, Silver, Gold, Platinum, and Catastrophic. 2  Monthly premiums: This is the amount you pay your insurance company for your plan whether you use medical services or not.
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receptor 1. Physiology A specialized cell or group of nerve endings that responds to sensory stimuli. 2. Biochemistry A molecular structure or site on the surface or interior of a cell that binds with substances such as hormones, antigens, drugs, or neurotransmitters.
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Special Senses: Receptors Any structure that is specialized to detect a stimulus. Some are simple nerve endings, like dendrites, others are sense organs; nerve endings combined with connective, epithelial, or muscular tissues that enhance or moderate the response to a stimulus.
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- receptor. 1. a molecule on the surface or within a cell that recognizes and binds with specific molecules, producing a specific effect in the cell; e.g., the cell-surface receptors for antigens or cytoplasmic receptors for steroid hormones.2. a sensory nerve ending that responds to various stimuli.. a molecule on the surface or within a cell that recognizes and binds with specific molecules, producing a specific effect in the cell; e.g., the cell-surface receptors for antigens or cytoplasmic receptors for steroid hormones. 2. a sensory nerve ending that responds to various stimuli.
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Receptors and Stimulation What is a sensory receptor? A sensory receptor is a living cell that responds to a particular type of energy. Receptors are often housed in a sense organ, a specialized structure that is constructed in such a way that it collects one type of energy particularly well, so the receptor cells can respond to it.
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Taste receptor A taste receptor is a type of receptor which facilitates the sensation of taste. When food or other substances enter the mouth, molecules interact with saliva and are bound to taste receptors in the oral cavity and other locations. Molecules which give a sensation of taste are considered sapid.Taste receptors are divided into two families:he TAS1R2 + TAS1R3 heterodimer receptor functions as the sweet receptor by binding to a wide variety of sugars and sugar substitutes. TAS1R2+3 expressing cells are found in circumvallate papillae and foliate papillae near the back of the tongue and palate taste receptor cells in the roof of the mouth.
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receptor Medical Definition of RECEPTOR. 1. : a cell or group of cells that receives stimuli: sense organ. 2. : a chemical group or molecule (as a protein) on the cell surface or in the cell interior that has an affinity for a specific chemical group, molecule, or virus.3.. : a cell or group of cells that receives stimuli: sense organ. 2. : a chemical group or molecule (as a protein) on the cell surface or in the cell interior that has an affinity for a specific chemical group, molecule, or virus.
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Estrace Estrogen; binds to nuclear receptors in estrogen-responsive tissues. Circulating estrogens modulate pituitary secretion of gonadotropins, luteinizing hormone, and follicle-stimulating hormone, through a negative feedback mechanism.
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Receptor Biology: Steven M. Sine Receptors are nature's transducers—they detect circulating hormones or substances released by nerve activity and elicit a biological response.Our research centers on specialized types of receptors called synaptic receptors, found on the surfaces of cells in close proximity to nerve terminals.f the receptor is located on a muscle cell, the impulse triggers contraction. Whereas if it is on a nerve cell, it causes release of transmitter substance on yet another cell. In this way, excitable cells communicate throughout the body by means of specialized pairs of neurotransmitter substances and receptors.
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Taste receptor A taste receptor is a type of receptor which facilitates the sensation of taste. When food or other substances enter the mouth, molecules interact with saliva and are bound to taste receptors in the oral cavity and other locations. Molecules which give a sensation of taste are considered sapid.bject A is a taste bud, object B is one taste cell of the taste bud, and object C is the neuron attached to the taste cell. I. Part I shows the reception of a molecule. 1. Sugar, the first messenger, binds to a protein receptor on the cell membrane.
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receptor Skin receptors respond to stimuli such as touch and pressure and signal the brain by activating portions of the nervous system. Receptors in the nose detect odors. 2. A cell structure or site that is capable of combining with a hormone, antigen, or other chemical substance.