Which cells of the afferent arteriole secrete renin?
The afferent arteriole in this region contains specialised secretory cells (smooth muscle cells) called juxtaglomerular cells, that secrete renin. These cells do two things: They monitor blood pressure, by measuring how much the arteriole wall is stretched.
What is responsible for renin secretion?
Renin is secreted from juxtaglomerular kidney cells, which sense changes in renal perfusion pressure, via stretch receptors in the vascular walls. The juxtaglomerular cells are also stimulated to release renin by signaling from the macula densa.
Where does renin get secreted from?
juxtaglomerular cells
Renin is an enzyme secreted by the juxtaglomerular cells of the kidney.
Which cells of the afferent arteriole secrete renin quizlet?
Terms in this set (49) 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.
What is the function of the macula densa?
Macula densa (MD) cells are chief cells within the kidney, playing key sensory and regulatory functions in the maintenance of body fluid, electrolyte homeostasis, and blood pressure.
What is the role of renin in the secretion of aldosterone quizlet?
It stimulates the synthesis of new sodium and potassium CHANNELS in the apical membrane. The renin-angiotensin-aldosterone system is a long-term endocrine pathway that regulates extracellular fluid volumes including blood plasma, lymph and interstitial fluid. RAAS also regulates arterial vasoconstriction.
What is the role of renin in the secretion of aldosterone?
Renin, which is released primarily by the kidneys, stimulates the formation of angiotensin in blood and tissues, which in turn stimulates the release of aldosterone from the adrenal cortex. Renin is a proteolytic enzyme that is released into the circulation by the kidneys.
What is renin and its function?
renin, enzyme secreted by the kidney (and also, possibly, by the placenta) that is part of a physiological system that regulates blood pressure. In the blood, renin acts on a protein known as angiotensinogen, resulting in the release of angiotensin I. See also renin-angiotensin system.
What is the function of renin quizlet?
What is the function of Renin? Cells in the kidneys respond to low blood pressure by releasing an enzyme called renin. Renin causes the kidneys to reabsorb sodium. Sodium reabsorption, in turn, is always accompanied by water retention.
What is the function of the macula densa cells of the Juxtaglomerular complex quizlet?
What is the function of the macula densa cells of the juxtaglomerular complex (JGC)? The macula densa cells monitor the NaCl content of the filtrate entering the distal convoluted tubule.
What secretes the enzyme renin quizlet?
What is Renin? It’s an enzyme secreted into the blood by the juxtaglomerular apparatus of the kidneys.
What is renin secretion?
renin, enzyme secreted by the kidney (and also, possibly, by the placenta) that is part of a physiological system that regulates blood pressure. In the blood, renin acts on a protein known as angiotensinogen, resulting in the release of angiotensin I.
How are afferent arterioles involved in the production of renin?
Cells in the afferent arterioles (juxtaglomerular cells) are the site of synthesis, storage, and release of the proteolytic enzyme renin. Three factors are important in stimulating renin secretion: 1. Perfusion pressure. When perfusion pressure to the kidneys is reduced, renin secretion by the afferent arteriole is stimulated.
How does perfusion pressure affect the secretion of renin?
Perfusion pressure. When perfusion pressure to the kidneys is reduced, renin secretion by the afferent arteriole is stimulated. Conversely, an increase in perfusion pressure inhibits renin release by the afferent arteriole.
What are the functions of the renin angiotensin system?
Renin–angiotensin system. From Wikipedia, the free encyclopedia. Jump to navigation Jump to search. Anatomical diagram of RAS. The renin–angiotensin system ( RAS ), or renin–angiotensin–aldosterone system ( RAAS ), is a hormone system that regulates blood pressure and fluid and electrolyte balance, as well as systemic vascular resistance.
Where does the release of renin take place?
Release of renin from juxtaglomerular cells in the terminal afferent arteriole is the first and, at least initially, the rate-limiting step of renin-angiotensin system activation that is precisely controlled by several mechanisms (Figure 1B).