The sensor in tubuloglomerular feedback is a group of cells called the

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The macula densa is a specialized group of cells located in the wall of the distal tubule of the nephron, which is part of the tubuloglomerular feedback mechanism. It senses changes in the flow and composition of the tubular fluid and signals the juxtaglomerular cells in the afferent arteriole to adjust the resistance of the glomerular capillaries, thereby regulating renal blood flow and glomerular filtration rate. The glomerulus and vasa recta are structures involved in the renal circulation but not directly related to tubuloglomerular feedback, while the macula lutea is a region of the retina responsible for central vision and has no relation to kidney function.

The Sensor in Tubuloglomerular Feedback Is a Group of Cells