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When JG cells release renin?...

When JG cells release renin?

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### Step-by-Step Solution: 1. **Understanding JG Cells**: JG (Juxtaglomerular) cells are specialized cells located in the walls of the afferent arterioles of the kidney. They play a crucial role in regulating blood pressure and fluid balance. 2. **Function of JG Cells**: The primary function of JG cells is to secrete the enzyme renin, which is essential for the renin-angiotensin-aldosterone system (RAAS), a hormone system that regulates blood pressure and fluid balance. 3. **Condition for Renin Release**: - **Drop in Blood Pressure**: JG cells release renin in response to a decrease in blood pressure. This drop in pressure is detected by stretch receptors located in the vascular wall of the afferent arterioles. ...
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