Juxtaglomerular apparatus is another name for the juxtaglomerular complex.
Because it is adjacent to (juxta) the glomerulus, the juxtaglomerular apparatus is so named.
It is composed of cells from the ascending limb of the loop of Henle's distal limb and an afferent arteriole that is placed close to the glomerulus.
It affects both the autoregulation of blood pressure (via the release of the hormone renin).
Renin is secreted by the juxtaglomerular apparatus. Renin responds to changes in blood flow. When blood pressure drops, renin-secreting cells are activated, which aids in maintaining a steady flow of blood through the nephron.
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