Q.148 Zoology ⭐ 360° Option Elimination Active

NEET 2025 Zoology Question 148 Solution

Topic: Chemical Coordination and Integration · Official NTA Booklet Code 45

Question

Match List - I with List - II. List I: A. Heart; B. Kidney; C. Gastro-intestinal tract; D. Adrenal Cortex. List II: I. Erythropoietin; II. Aldosterone; III. Atrial natriuretic factor; IV. Secretin. Choose the correct answer from the options given below:

✓

Verified Against NTA Final Answer Key

Option (4) : A-III, B-I, C-IV, D-II

📚 Chemical Coordination and Integration Easy

📋 Given Parameters & Problem Setup

List - I (Organs / Tissues) A. Heart, B. Kidney, C. Gastro-intestinal tract, D. Adrenal Cortex

List - II (Hormones Secreted) I. Erythropoietin, II. Aldosterone, III. Atrial natriuretic factor, IV. Secretin

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The 30-Second Exam Hall Shortcut: ⚡ Non-Endocrine Organ Hormones Fingerprint

⏱️ Save ~30 seconds

Heart atrial wall = ANF (Atrial Natriuretic Factor, III); Kidney JG cells = Erythropoietin (RBC production, I); GI tract = Secretin (exocrine pancreas stimulation, IV); Adrenal Cortex = Aldosterone (mineralocorticoid, II)! Code: A-III, B-I, C-IV, D-II!

1 Match endocrine secretions from non-classical organs from NCERT Section 22.4:

2 - Heart: Atrial wall secretes Atrial Natriuretic Factor (ANF), which dilates blood vessels and lowers BP (A -> III).

3 - Kidney: Juxtaglomerular cells produce a peptide hormone called Erythropoietin, stimulating erythropoiesis (B -> I).

4 - Gastro-intestinal tract: Endocrine cells secrete Secretin, stimulating water and bicarbonate secretion from pancreas (C -> IV).

5 - Adrenal Cortex: Zona glomerulosa secretes the principal mineralocorticoid Aldosterone (D -> II).

6 Unique combination: A-III, B-I, C-IV, D-II (Option 4)!

7 Solved in under 10 seconds!

🛡️

Why You Can 100% Trust This Shortcut: Adrenal Medulla and Cortex Hormones (NCERT Biology · Chemical Coordination and Integration: Catecholamines as fight-or-flight hormones).

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Endocrine Secretions of Non-Classical Organs and Adrenal Cortex

Analyzing the specific endocrine functions of tissues outside the traditional pituitary/thyroid glands:

• A. Heart: The atrial wall of our heart secretes a very important peptide hormone called Atrial Natriuretic Factor (ANF). When blood pressure is increased, ANF is secreted causing vasodilation and thereby decreasing blood pressure. Hence, A matches III.
• B. Kidney: The juxtaglomerular (JG) cells of kidney produce a peptide hormone called Erythropoietin (EPO) which stimulates erythropoiesis (formation of RBCs in bone marrow). Hence, B matches I.
• C. Gastro-intestinal tract (GIT): Endocrine cells present in different parts of the gastro-intestinal tract secrete four major peptide hormones: gastrin, secretin, cholecystokinin (CCK), and gastric inhibitory peptide (GIP). Secretin acts on the exocrine pancreas and stimulates secretion of water and bicarbonate ions. Hence, C matches IV.
• D. Adrenal Cortex: Composed of three distinct layers (zona reticularis, zona fasciculata, zona glomerulosa). The outermost layer (zona glomerulosa) secretes mineralocorticoids, mainly Aldosterone, which regulates sodium and water reabsorption in renal distal tubules. Hence, D matches II.

Step 2

Formulating the Matching Code

Consolidating the four organ-hormone associations:

• A -> III (Heart - Atrial natriuretic factor)
• B -> I (Kidney - Erythropoietin)
• C -> IV (Gastro-intestinal tract - Secretin)
• D -> II (Adrenal Cortex - Aldosterone)

Step 3

Conclusion

The correct matching option is A-III, B-I, C-IV, D-II, exactly matching Option (4).

\text{Matching: } A\text{-III}, \; B\text{-I}, \; C\text{-IV}, \; D\text{-II}

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360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 A

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns aldosterone to heart and ANF to gastro-intestinal tract.

⚠️

Student Fallacy (Why candidates pick this trap): Scrambling cardiac and adrenal hormones.

2 B

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns secretin to heart and erythropoietin to adrenal cortex.

⚠️

Student Fallacy (Why candidates pick this trap): Complete confusion across organ systems.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Assigns erythropoietin to heart and ANF to kidney.

⚠️

Student Fallacy (Why candidates pick this trap): Inverting cardiac and renal hormones.

4 D

✓ 100% Correct

Verdict & Scientific Reason:

100% correct. Accurately links heart, kidney, gut, and adrenal cortex to their corresponding hormones.

💡

Why this is airtight: None; pristine endocrine knowledge.

⚠️

NTA Trap Alert: Heart vs Kidney in Blood Pressure Regulation

Kidney secretes RENIN (which triggers aldosterone to RAISE blood pressure) and ERYTHROPOIETIN (for RBCs). Heart secretes ANF to LOWER blood pressure. Do not mix up the organs!

🛡️ How to avoid the -1 mark: Heart = Atria = ANF. Kidney = JG cells = Erythropoietin.

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Core NEET Syllabus Standard

NEET Biology Core Syllabus · Chemical Coordination and Integration Standard Benchmark

Core Scientific Principle Tested:

"Heart secretes ANF, kidney produces erythropoietin, GIT secretes secretin, and adrenal cortex secretes aldosterone."

Syllabus Focus: Hormones of Heart, Kidney and Gastrointestinal Tract

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

H-ANF (Heart), K-EPO (Kidney), G-Sec (Gut), C-Aldo (Cortex)!

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NEET 2025 Zoology Question 148 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ Non-Endocrine Organ Hormones Fingerprint

Step-by-Step Rigorous Workflow & Mathematical Proof

Endocrine Secretions of Non-Classical Organs and Adrenal Cortex

Formulating the Matching Code

Conclusion

360° Option Elimination Engine Key Feature

NTA Trap Alert: Heart vs Kidney in Blood Pressure Regulation

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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