pacinian corpuscle definition
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What is a Pacinian Corpuscle? A Pacinian corpuscle is a type of touch receptor located in the skin. It is classed as a mechanoreceptor, meaning it is part of the group of sensory receptors that respond to touch and pressure.lthough there are similarities between the two, a Pacinian corpuscle is not as discriminatory as the type of fine-touch mechanoreceptor present in the fingertips, known as Meissner's corpuscle. This type of sensory receptor lies closer to the surface of the skin and adapts only moderately fast.
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corpus luteum corpus luteum. 1. Anatomy, Zoology. a ductless gland developed within the ovary by the reorganization of a Graafian follicle following ovulation. 2. Pharmacology. an extract of this gland, usually of the hog or cow, the chief product of which is progesterone.
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What Is The Striatum? The corpus striatum, a macrostructure which contains the striatum, is composed of the entire striatum and the globus pallidus. The lenticular nucleus refers to the putamen together with the globus pallidus.he striatum is heterogeneous in terms of its component neurons. 1  Spiny projection neurons, commonly referred to as medium spiny neurons, are the principal neurons of the striatum. 2  Cholinergic interneurons release acetylcholine, which has a variety of important effects in the striatum. 3  There are many types of GABAergic interneurons.
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Premature Atrial Contractions (PACs) Premature Atrial Contractions (PACs) are amongst the most common forms of arrhythmias. It is due to the premature discharge of an electrical impulse in the atrium, causing a premature contraction. Therefore, it is named premature atrial contraction, or PAC. A PAC is premature, because the it occurs earlier than the next regular beat should have occurred. Most often, patients with PACs complain of palpitations.
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- Composed of a glomerulus and the Bowman's capsule, the renal corpuscle (or Malpighian corpuscle) is the beginning of the nephron. It is the nephron's initial filtering component. The glomerulus is a capillary tuft that receives its blood supply from an afferent arteriole of the renal circulation.he two general classes of nephrons are cortical nephrons and juxtamedullary nephrons, both of which are classified according to the length of their associated Loop of Henle and location of their renal corpuscle.
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- The renal corpuscle is the basic filtration structure of the kidney. Bowman's capsule is part of the filtration system in the nephrons of the kidneys. The kidneys contain millions of nephrons, which are responsible for filtering the blood.
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corpus spongiosum Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia. corpus spongiosum. one of the cylinders of spongy tissue, with the corpora cavernosa, on the dorsum of the penis, erectile tissue, from bulb to glans. It contains the urethra and erectile tissue within labia minora.
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- Noun. 1. columnar epithelial cell-an epithelial cell that is shaped like a column; some have cilia. columnar cell. epithelial cell-one of the closely packed cells forming the epithelium. spongioblast-any of various columnar epithelial cells in the central nervous system that develop into neuroglia.. columnar epithelial cell-an epithelial cell that is shaped like a column; some have cilia. columnar cell. epithelial cell-one of the closely packed cells forming the epithelium. spongioblast-any of various columnar epithelial cells in the central nervous system that develop into neuroglia.
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Mechanoreceptor A mechanoreceptor is a sensory receptor that responds to mechanical pressure or distortion. Normally there are four main types in glabrous skin: Pacinian corpuscles, Meissner's corpuscles, Merkel's discs, and Ruffini endings.amellar corpuscles, or Pacinian corpuscles, are pressure receptors located in the skin and also in various internal organs. Each is connected to a sensory neuron. Because of its relatively large size, a single lamellar corpuscle can be isolated and its properties studied.
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151 unit 10 The corpus luteum (Latin for yellow body; plural corpora lutea) is a temporary endocrine structure in female mammals that is involved in the production of relatively high levels of progesterone and moderate levels of estradiol and inhibin A.he corpus luteum is typically very large relative to the size of the ovary; in humans, the size of the structure ranges from under 2 cm to 5 cm in diameter.
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Corpus luteum The corpus luteum is a temporary endocrine structure in female ovaries and is involved in the production of relatively high levels of progesterone, moderate levels of estradiol, inhibin A and small amounts of estrogen. It is the remains of the ovarian follicle that has released a mature ovum during a previous ovulation. It is colored as a result of concentrating carotenoids from the diet and secretes a moderate amount of estrogen to inhibit further release of gonadotropin-releasing hormone and t
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- : a unipolar nerve cell found in the retina, in the olfactory bulb, and in close connection with the Purkinje cells of the cerebellum.What made you want to look up amacrine cell? a unipolar nerve cell found in the retina, in the olfactory bulb, and in close connection with the Purkinje cells of the cerebellum.
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SSIS Process Control SSIS Event Handler. The event handler process control, unlike the data flow process control, is not managed by the control flow. When you want to control processing at specific occurrences of events during package execution, you use the SSIS event handler process control component.
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- Pacinian corpuscles are large receptors, located deep within the skin. Each cutaneous receptor (including Pacinian corpuscles) contains a nerve ending that is, essentially, the dendrite of a neuron whose cell body is located in a ganglion near the spinal cord, the dorsal root ganglion.he nerve fibers that innervate skin receptors have their cell bodies in the dorsal root ganglion, a group of neuron cell bodies near the spinal cord. The axons of dorsal root ganglion cells project in to the spinal cord, where they synapse with neurons in the dorsal horn of the grey matter.
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Nucleus accumbens The nucleus accumbens (NAc or NAcc), also known as the accumbens nucleus or as the nucleus accumbens septi (Latin for nucleus adjacent to the septum) is a region in the basal forebrain rostral to the preoptic area of the hypothalamus.he nucleus accumbens core is the inner substructure of the nucleus accumbens. Location: The nucleus accumbens core is part of the ventral striatum, located within the basal ganglia.
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Nucleus accumbens The nucleus accumbens (NAcc), also known as the accumbens nucleus or as the nucleus accumbens septi (Latin for nucleus leaning against the septum), is a collection of neurons within the striatum and is one of the largest nuclei in the septal region.he principal neuronal cell type found in the nucleus accumbens is the medium spiny neuron. The neurotransmitter produced by these neurons is gamma-aminobutyric acid (GABA), one of the main inhibitory neurotransmitters of the central nervous system.
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Nucleated red blood cell In contrast, a nucleated red blood cell (NRBC), also known by several other names, is a mammalian RBC that contains a cell nucleus. NRBCs occur in normal development as progenitor cells in the erythropoietic lineage and in pathological states.
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Ruffini's corpuscle Ruffini's corpuscle Ruf·fi·ni's corpuscle (rə-fē'nēz, rōō-) n. Any of numerous sensory end organs in the subcutaneous connective tissues of the fingers, consisting of an ovoid capsule within which the sensory fiber ends with numerous collateral knobs.
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B. Microscopic Study of Skin Survey the dermis and locate these receptors. Locate the large Pacinian corpuscles. Pacinian corpuscles are the largest encapsulated pressure receptors in the body. They are ovoid structures, some of which are visible with the unaided eye, measuring 1 - 2 mm along their long axis.
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- Ruffini corpuscles in skin are considered to be skin stretch sensitive receptors of the discriminative touch system. They also work with the proprioceptors in joints and muscles to indicate the position and movement of body parts.he sensitivity of the receptors to specific stimuli (e.g., touch verses muscle stretch) is determined by the location of the receptor and by the non-neural tissue surrounding the 1° afferent terminal (Figure 2.6). Figure 2.6. The locations of cutaneous (somatosensory) receptors in hairy and non-hairy (glabrous) skin.
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- A cerebellar peduncle is a nerve tract that permits communication between the cerebellum and the other parts of the central nervous system. Three pairs of cerebellar peduncles conduct this communication.
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Premature Atrial Complexes (PACs) Updated December 31, 2015. Premature atrial complexes, or PACs, are “extra” heartbeats that arise within the atria of the heart. PACs are the most common variety of heart arrhythmia. In fact, PACs are so common that most people will have them occasionally. Read about the heart’s chambers and valves.
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Action Potential and Receptor Olfactory Receptor Essay Which of the following modalities will induce the largest amplitude receptor potential in the Pacinian corpuscle Your answer : c. moderate-intensity pressure. Predict Question 2: The adequate stimuli for olfactory receptors are chemicals, typically odorant molecules.
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- Two types of transient receptors are found in hairy skin. Pacinian corpuscle receptors are associated with the peripheral ends of certain type A alpha and beta fibers. They respond to mechanical taps and vibrations in the 50- to 500-Hz range.
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Mechanoreceptor Lamellar corpuscles, or Pacinian corpuscles, are pressure receptors located in the skin and also in various internal organs. Each is connected to a sensory neuron. Because of its relatively large size, a single lamellar corpuscle can be isolated and its properties studied.
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CHAPTER Premature atrial contractions (PAC s) are beats which are initiated in the atria or upper chambers of the heart, prematurely, which cause the SA node (the natural pacemaker of the heart) to be interrupted.