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Locally expressed renin–angiotensin systems have been found in a number of tissues, including the kidneys, adrenal glands, the heart, vasculature and nervous system, and have a variety of functions, including local cardiovascular regulation, in association or independently of the systemic renin–angiotensin system, as well as non ...
Renin (etymology and pronunciation), also known as an angiotensinogenase, is an aspartic protease protein and enzyme secreted by the kidneys that participates in the body's renin-angiotensin-aldosterone system (RAAS)—also known as the renin-angiotensin-aldosterone axis—that increases the volume of extracellular fluid (blood plasma, lymph, and interstitial fluid) and causes arterial ...
Changes in renin ultimately alter the output of this system, principally the hormones angiotensin II and aldosterone. Each hormone acts via multiple mechanisms, but both increase the kidney's absorption of sodium chloride, thereby expanding the extracellular fluid compartment and raising blood pressure. When renin levels are elevated, the ...
Renin–angiotensin system: The kidneys sense low blood pressure. Release renin into the blood. Renin causes production of angiotensin I. Angiotensin-converting enzyme (ACE) converts angiotensin I to angiotensin II. Angiotensin II stimulates the release of aldosterone, ADH, and thirst.
183 11606 Ensembl ENSG00000135744 ENSMUSG00000031980 UniProt P01019 P11859 Q3UTR7 RefSeq (mRNA) NM_000029 NM_001382817 NM_001384479 NM_007428 RefSeq (protein) NP_000020 NP_001369746 NP_031454 Location (UCSC) Chr 1: 230.69 – 230.75 Mb Chr 8: 125.28 – 125.3 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Angiotensin is a peptide hormone that causes vasoconstriction and an increase ...
Furosemide blocks NaCl reabsorption mediated by the NKCC2 at the ascending loop of henle, which leads to increased renin release. Excluding loop diuretic use, the usual situation that causes a reduction in reabsorption of NaCl via the NKCC2 at the macula densa (DCT) is a low tubular lumen concentration of NaCl due to low GFR.
Sodium is reabsorbed in the thick ascending limb of loop of Henle, by Na-K-2Cl symporter and Na-H antiporter.It goes against its chemical driving force, but the high electrical driving force renders the overall electrochemical driving force positive anyway, availing some sodium to diffuse passively either the transcellular or paracellular way.
In the kidney, the macula densa is an area of closely packed specialized cells lining the wall of the distal tubule where it touches the glomerulus.Specifically, the macula densa is found in the terminal portion of the distal straight tubule (thick ascending limb of the loop of Henle), after which the distal convoluted tubule begins.