The JGA (Juxta Glomerular Apparatus) is a special sensitive region formed by cellular modifications in ____ related to the same nephron.

Related Formula

Fall in GFR arrow Renin release arrow Angiotensinogen arrow Angiotensin I arrow Angiotensin II arrow Aldosterone arrow Increased GFR$\text{Fall in GFR} \rightarrow \text{Renin release} \rightarrow \text{Angiotensinogen} \rightarrow \text{Angiotensin I} \rightarrow \text{Angiotensin II} \rightarrow \text{Aldosterone} \rightarrow \text{Increased GFR}$

Core Logic

The step-by-step sequence of the RAAS mechanism is:

• Fall in glomerular filtration rate (GFR) / blood flow (C)
• JG cells release Renin, converting Angiotensinogen to Angiotensin I and then to Angiotensin II (E)
• Angiotensin II causes vasoconstriction and stimulates adrenal cortex to release Aldosterone (D)
• Aldosterone causes reabsorption of Na^+$Na^+$ and H₂O$H_2O$ from DCT (B)
• Increase in blood pressure and GFR back to normal (A)

Step 1: Sequence Order

The correct order is C arrow$\rightarrow$ E arrow$\rightarrow$ D arrow$\rightarrow$ B arrow$\rightarrow$ A.

Pattern Recognition

Sees: "Renin-Angiotensin mechanism order". Shortcut: Starts with Fall in GFR (C) and ends with Increase in BP/GFR (A).

Chapter Mix

Class 11 Biology: Excretory Products and Their Elimination