Physiology for NEET PG 2026

Physiology in NEET PG 2026 tests your ability to translate normal function into clinical abnormality. A question will rarely ask you to define stroke volume in isolation; it will give you a patient with a falling cardiac output and ask you to identify which compensatory mechanism — Frank-Starling, sympathetic activation, or peripheral vasoconstriction — is operating. The 55 syllabus topics span cardiovascular, respiratory, renal, neurophysiology, gastrointestinal, endocrine, reproductive, blood, special senses, and muscle physiology. Cardiovascular and respiratory together account for roughly 40–45% of Physiology questions in recent PYQ analysis, making them your highest-return investment.

The subject intersects directly with clinical practice at every ward round. Understanding the Oxygen Dissociation Curve is not academic — it explains why a COPD patient with a PaO₂ of 55 mmHg is still ambulatory while a patient with acute pneumonia at the same PaO₂ is in distress. Knowing the phases of the Cardiac Cycle lets you localise murmurs to systole or diastole without an echocardiogram. GFR and Renal Clearance underpin every nephrology and pharmacology question involving drug dosing in renal failure — a connection that NEET PG exploits repeatedly in integrated stems.

The syllabus shape rewards systems thinking. Cardiovascular physiology alone contains six of the top 12 high-yield topics: Cardiac Cycle, ECG Waves and Intervals, Blood Pressure Regulation, Heart Sounds and Murmurs, Cardiac Output Regulation, and Cardiac Action Potential. Respiratory physiology contributes four: Spirometry and Lung Volumes, Gas Transport, Ventilation-Perfusion Matching, and the Oxygen Dissociation Curve. You should treat these two systems as your anchor blocks and build outward.

A common misconception is that Physiology is "easy theory" that can be covered in the last two weeks before the exam. In reality, the clinical-reasoning format means surface-level reading produces wrong answers — you will confuse a right-to-left shunt (V/Q = 0, PaO₂ barely improves on 100% O₂) with dead-space physiology (V/Q = infinity, PaO₂ improves well on supplemental O₂) if you have not worked through the underlying mechanism. Another misconception is that Guyton is the only book you need; for NEET PG, Guyton must be supplemented with PYQ-based revision because the exam tests specific numerical thresholds — normal GFR of 125 mL/min, PR interval of 120–200 ms, FEV₁/FVC cut-off of less than 0.70 in obstruction — that are scattered across chapters and easy to miss in a single linear read.