Wednesday, October 21, 2009

Explain why the glomerulus is such a high-pressure capillary bed? How does its high pressure condition aid its


Answer:
The glomerulus is a high-pressure capillary bed because it is the most proximate location of filtration when the body attempts to adjust blood volume in response to increased arterial pressure. Its ability to accomodate a high pressure load aids its function because it is often necessary to rapidly adjust (i.e. reduce) high blood pressure, which prominently involves the excretion of water -- this requires that the glomerulus be able to handle a high level of pressure that comes with high volume flow through the renal system.
Arterioles are present on either side of the glomerulus (afferent and efferent). If the afferent arteriole is dilated and the efferent arteriole is constricted, the pressure will be high. The pressure can be regulated by controlling the two arterioles.The pressure drives fluid and other material through the glomerular basement membrane.
I imagine the glomeruli (plural form of glomerulus) are high-pressure capillary beds because they filter waste and sodium. The clean fluids have to get through the filtrate (the stuff that was filtered).I remember I learned the glomeruli clean themselves...I didn't learn how though =(. There are millions of them in the kidneys.You didn't seem to finish your question, you left off at "How does its high pressure condition aid its"__________

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