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Definition of Juxtaglomerular apparatus

Juxtaglomerular apparatus: The prefix "juxta-" comes from the Latin preposition meaning near, nearby, close.

The juxtaglomerular apparatus is a collective term referring to the cells near a structure called the glomerulus in the kidney. The juxtaglomerular cells are specialized cells that stimulate the secretion of the adrenal hormone aldosterone and play a major role in renal autoregulation, the kidney's self-governance.

The JGA is also important in the regulation of salt excretion.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=8180
Last Editorial Review: 9/20/2012

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