Respuesta :
The afferent arteriole contracts in response to increased salt levels, lowering blood flow to the glomerulus and the rate of glomerular filtration. To adjust blood volume and bring blood pressure back to normal, macula densa cells that sense variations in sodium chloride levels will initiate an autoregulatory response that will increase or reduce the reabsorption of ions and water to the blood (as needed).
The primary cells of the kidney are known as macula densa (MD) cells, which have important sensory and regulatory roles in the regulation of blood pressure, electrolyte homeostasis, and bodily fluids.The afferent arteriole is dilated by the macula densa cells in response to reduced sodium chloride, increasing GFR. The concentration of sodium chloride will rise in response to an increase in GFR.
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