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renin
💉Renin is an enzyme secreted by the juxtaglomerular cells of the kidneys in response to low blood pressure or sodium levels.
🧪It initiates the renin-angiotensin-aldosterone system (RAAS), which leads to vasoconstriction and increased blood volume.
📈This process helps raise blood pressure by conserving sodium and water and narrowing blood vessels.
🔬Other kidney hormones like erythropoietin and calcitriol serve different functions such as red blood cell production and calcium regulation.
📌Core Message
The kidneys release renin to initiate the RAAS system, which helps regulate blood pressure through vasoconstriction and fluid retention.
This question is from SCIENCE 2023 Exam-2 which contains 45 questions.
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