olfactory glomerulus(redirected from Glomerulus (olfaction))
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one of the small spheric territories in the olfactory bulb in which dendrites of mitral and tufted cells synapse with axons of olfactory receptor cells.
A neural network found in the olfactory bulb, formed by the dendrites of mitral cells intertwined with the axons of olfactory receptor cells.
See also: glomerulus
pl. glomeruli [L.] a small tuft or cluster.
termination sites for dendrites and axons of cerebellar and medullary and spinal nerve fibers.
termination points of olfactory nerves in the olfactory lobes.
a small convoluted mass of capillaries, a network of vascular tufts, encased in the malpighian or Bowman's capsule.
The glomerulus is an integral part of the nephron, the basic unit of the kidney. Each nephron is capable of forming urine by itself, and each kidney has many nephrons. The specific function of each glomerulus is to bring blood (and the waste products it carries) to the nephron. As the blood flows through the glomerulus, about one-fifth of the plasma passes through the glomerular membrane, collects in the malpighian capsule, and then flows through the renal tubules. Much of this fluid passes back into the blood via the small capillaries around the tubules (peritubular capillaries). The continuous filtration of fluid from the glomeruli and its reabsorption into the peritubular capillaries is made possible by a high pressure in the glomerular capillary bed and a low pressure in the peritubular bed.
Any disease of the glomeruli, such as acute or chronic glomerulonephritis, must be considered serious because it interferes with the basic functions of the kidneys; that is, filtration of liquids and excretion of certain end products of metabolism and excess sodium, potassium and chloride ions that may accumulate in the blood.