Juxtaglomerular cell - Wikipedia Juxtaglomerular cell Not to be confused with granule cell. Juxtaglomerular cell Microscopic image of juxtaglomerular cells Drawing of renal corpuscle : juxtaglomerular cells ( granular cells ) are labeled as number 6. Macula densa cells are labeled 7, extraglomerular mesangium are labeled 5b. Anatomical terminology ( edit on Wikidata ) This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. Please help to improve this article by introducing more precise citations. ( May 2015 ) The juxtaglomerular cells ( JG cells, or granular cells ) are cells in the kidney that synthesize, store, and secrete the enzyme renin. They are specialized smooth muscle cells mainly in the walls of the afferent arterioles, and some in the efferent arterioles, that deliver blood to the glomerulus. In synthesizing renin, they play a critical role in the renin - angiotensin system and thus in autoregulation of the kidney. Juxtaglomerular cells secrete renin in response to a drop in pressure detected by stretch receptors in the vascular walls, or when stimulated by macula densa cells. Macula densa cells are located in the distal convoluted tubule, and stimulate juxtaglomerular cells to release renin when they detect a drop in sodium concentration in tubular fluid. Together, juxtaglomerular cells, extraglomerular mesangial cells and macula densa cells comprise the juxtaglomerular complex. In appropriately stained tissue sections, juxtaglomerular cells are distinguished by their granulated cytoplasm. The juxtaglomerular cell is a cell that is located near the glomerulus, hence its name. Similar to cardiac tissue, juxtaglomerular cells harbor β1 adrenergic receptors. When stimulated by epinephrine or norepinephrine, these receptors induce the secretion of renin. These cells also respond directly to a decrease in systemic blood pressure which is manifested as a lower renal perfusion pressure. See also Juxtaglomerular cell tumor Juxtaglomerular apparatus External links Histology image : 16010loa -- Histology Learning System at Boston University Anatomy of the urinary system Kidneys Layers Fascia Capsule Cortex column Medulla sinus pyramids medullary interstitium Lobe Cortical lobule Medullary ray Nephron Circulation Arteries Renal artery segmental interlobar arcuate interlobular afferent Veins Renal vein Peritubular capillaries Vasa recta arcuate interlobar efferent Nephron Renal corpuscle Glomerulus Bowman 's capsule Glomerular basement membrane Podocyte Filtration slits Mesangium Intraglomerular mesangial cell Renal tubule Proximal convoluted tubule Loop of Henle Descending Thin ascending Thick ascending Distal convoluted tubule Connecting tubule Collecting ducts Tubular fluid Renal papilla Minor calyx Major calyx Renal pelvis Juxtaglomerular apparatus Macula densa Juxtaglomerular cells Mesangium Extraglomerular mesangial cell Ureters Orifice of ureter Ureteropelvic junction Bladder Apex Uvula Neck Median umbilical ligament Muscular layer Trigone Detrusor Mucosa Submucosa Urethra Urethral sphincters External sphincter male female Internal sphincter Cells in humans derived from mesoderm Paraxial Mesenchymal stem cell Osteochondroprogenitor cell Bone ( Osteoblast → Osteocyte ) Cartilage ( Chondroblast → Chondrocyte ) Myofibroblast Fat Lipoblast → Adipocyte Muscle Myoblast → Myocyte Myosatellite cell Tendon cell Cardiac muscle cell Other Fibroblast → Fibrocyte Other Digestive system Interstitial cell of Cajal Intermediate Renal stem cell Angioblast → Endothelial cell Mesangial cell Intraglomerular Extraglomerular Juxtaglomerular cell Macula densa cell Stromal cell → Interstitial cell → Telocytes Simple epithelial cell → Podocyte Kidney proximal tubule brush border cell Reproductive system Sertoli cell Leydig cell Granulosa cell Peg cell germ cells spermatozoon ovum Lateral plate / hemangioblast Hematopoietic stem cell Lymphoid Lymphoblast see lymphocytes Myeloid CFU - GEMM see myeloid cells Circulatory system Endothelial progenitor cell Endothelial colony forming cell Endothelial stem cell Angioblast / Mesoangioblast Pericyte Mural cell This article related to the genitourinary system is a stub. You can help Wikipedia by expanding it. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Juxtaglomerular_cell&oldid=770927375 '' Categories : Genitourinary system stubs Kidney anatomy Human cells Hidden categories : Articles which use infobox templates with no data rows Articles lacking in - text citations from May 2015 All articles lacking in - text citations All stub articles Talk About Wikipedia Čeština Eesti 日本 語 Polski Português Русский Slovenščina 中文 Edit links This page was last edited on 18 March 2017, at 13 : 36. About Wikipedia

Question: when do cells in the kidneys secrete renin quizlet
Answer: in response to a drop in pressure detected by stretch receptors in the vascular walls