Important Topics for NEET MDS 2027: Physiology
The Philosophy
"Physiology requires connecting the dots. It’s not just about memorizing organs, but understanding the mechanisms, feedback loops, and reflexes that keep the body in homeostasis."
The following is a targeted breakdown of the highest priority foundational topics based on recent exam question patterns.
1. GIT and Digestive Secretions
Core Focus
- Salivary enzymes (Parotid amylase, Lysozyme, Lipase)
- Ductal modification of saliva (Striated duct reabsorption)
- Functions of specific GI enzymes
NEET MDS LOGIC
Dental exams heavily favor the composition and modification of saliva. Knowing exactly which duct reabsorbs solutes and which enzymes lack antimicrobial action is a guaranteed point.
Framing: "Which enzyme in saliva does not have antimicrobial action?"
Past Question Patterns
- NEET MDS 2026: Major solutes in saliva are reabsorbed in the (Striated duct).
- NEET MDS 2024: Which of the following is a major enzyme of the saliva? (Parotid amylase).
- NEET MDS 2024: Which enzyme in saliva does not have antimicrobial action? (Lipase).
2. Digestion and Its Regulation
Core Focus
- Migratory Motor Complex (MMC)
- Enteric nervous system & sphincter control
- Bile acid functions & Clinical GI Pathologies (Crohn's)
NEET MDS LOGIC
Focuses on interdigestive motility and the absorption of fats. Understand how the gut clears itself during fasting.
Framing: "Following 24 hours of fasting, which type of contraction clears residual food and secretions from the stomach?"
Past Question Patterns
- NEET MDS 2026: A patient with mucosal erosions and a characteristic 'cobblestone' appearance has (Crohn's Disease).
- NEET MDS 2022: Inhibition of enteral motor neurons can result in (Lower esophageal sphincter dysfunction).
- NEET MDS 2020: The contraction responsible for clearing residual food during fasting is the (Migratory motor complex).
- NEET MDS 2020: A young patient with sudden weight loss, pale stools, and normal bilirubin likely has a deficiency in (Bile acid).
3. Regulation of Breathing & Respiratory Mechanics
Core Focus
- Respiratory centers (Pneumotaxic & Apneustic)
- Pulmonary surfactant & Alveolar mechanics
- Airway resistance (Sympathetic vs Parasympathetic)
NEET MDS LOGIC
Neuro-regulation of breathing and the role of surfactant in preventing alveolar collapse are standard high-yield questions you must not get wrong.
Framing: "Inhibitory signals to inspiration are transmitted by this centre which is located in the pons and medulla:"
Past Question Patterns
- NEET MDS 2025: Which cells in the lungs give rise to 'heart failure cells'? (Macrophages).
- NEET MDS 2024: Inhibitory signals are transmitted by the (Pneumotaxic centre).
- NEET MDS 2024: Decreased airway resistance is seen during (Sympathetic stimulation).
- NEET MDS 2022: The primary function of pulmonary surfactant is to (Prevent alveolar collapse).
- NEET MDS 2021: Which of the following is NOT related to the respiratory centre? (Caudal ventrolateral medulla).
4. Renal System
Core Focus
- Sites of maximum tubular reabsorption (PCT)
- Secretory products of tubules (Uromodulin)
- Hemodynamics (GFR and Filtration fraction regulation)
NEET MDS LOGIC
Highly mechanical section. You must be able to visualize the nephron and pinpoint exactly where water is absorbed and how arteriole constriction affects GFR.
Framing: "Which part of the nephron secretes uromodulin?"
Past Question Patterns
- NEET MDS 2025: Maximum resorption of water takes place in which part of the nephron? (PCT).
- NEET MDS 2025: Constriction of the (Efferent arteriole) will increase both glomerular filtration rate (GFR) and filtration fraction.
- NEET MDS 2020: Which part of the nephron secretes uromodulin? (Ascending loop of Henle).
5. Types of Nerve Fibers and Nerve Injury
Core Focus
- Seddon's Classification (Neurotmesis vs Neuropraxia)
- Wallerian degeneration timeline
- Pain pathways (C fibers vs A-delta fibers)
NEET MDS LOGIC
High dental relevance since iatrogenic nerve injuries (like mental nerve transection) occur in oral surgery. You must know pain pathways cold.
Framing: "Complete transection of the mental nerve occurs in which type of nerve injury?"
Past Question Patterns
- NEET MDS 2026: Complete transection of mental nerve occurs in (Neurotmesis).
- NEET MDS 2025: Wallerian degeneration is classically seen in (Nerve).
- NEET MDS 2022: Which type of nerve fibers is primarily responsible for transmitting referred pain? (C fibers).
- NEET MDS 2021: Referred pain is carried by (C fibers).
6. Heart as a Pump
Core Focus
- Cardiac Output calculations (CO = SV x HR)
- Ejection fraction vs Stroke Volume
- Jugular Venous Pulse (JVP) waveforms and valve mechanics
NEET MDS LOGIC
Cardiovascular hemodynamics are heavily tested via formulas. Know how to calculate cardiac output given ESV, EDV, and HR.
Framing: "Fraction of EDV ejected with every stroke is called:"
Past Question Patterns
- NEET MDS 2026: In JVP, the 'c' wave is due to the (Bulging of tricuspid valve during the isovolumetric contraction phase).
- NEET MDS 2023: Cardiac output for a patient with EDV 120ml, ESV 70ml, and HR 70bpm is (3.5 litres).
- NEET MDS 2023: Fraction of EDV ejected with every stroke is called (Ejection fraction).
- NEET MDS 2022: Muscle which affects expansion of AV valves is (Chordae tendineae).
7. Cardiovascular Regulatory Mechanism
Core Focus
- Baroreceptor reflex mechanism
- Postural (Orthostatic) hypotension response
- Autonomic control of heart rate
NEET MDS LOGIC
Very clinically applicable to dentistry when patients change positions abruptly in the dental chair. Understand the reflex arc for blood pressure correction.
Framing: "A patient experiences dizziness upon standing suddenly from a dental chair. Which reflex is responsible for the rapid recovery of blood pressure?"
Past Question Patterns
- NEET MDS 2024: Baroreceptors are primarily activated by changes in (Blood pressure).
- NEET MDS 2021: Upon suddenly standing up, a patient experiences a transient drop in BP followed by recovery. This is mediated by the (Baroreceptor reflex).
8. Central Nervous System (CNS)
Core Focus
- Cortical localization (Broca's, Wernicke's, Premotor)
- Cerebellar lesions (Ataxia, Dysdiadochokinesia)
- Brainstem protective reflexes (Gag reflex)
NEET MDS LOGIC
A massive topic. Cortical localization (knowing Broca's is in the frontal lobe) and reflex arcs (gag reflex in medulla) are perennial examiner favorites.
Framing: "During impression making, a patient develops a gag reflex. Which part of the brain is primarily responsible for coordinating this airway protective reflex?"
Past Question Patterns
- NEET MDS 2026: The gag reflex and involuntary swallowing are primarily coordinated by the (Medulla oblongata and pons).
- NEET MDS 2026: A patient who cannot perform skilled movements but has normal strength/sensation has a lesion in the (Premotor cortex).
- NEET MDS 2024: Imbalance, ataxia, and dysdiadochokinesia indicate a lesion in the (Cerebellum).
- NEET MDS 2024: Broca's area is situated in which lobe? (Frontal / Precentral gyrus).
- NEET MDS 2023: Fluent speech with nonsensical neologisms and impaired comprehension is indicative of (Wernicke's area) aphasia.
9. Pituitary, Thyroid and Pancreatic Hormones
Core Focus
- Type 2 DM pathophysiology (Insulin resistance)
- Hypothyroidism profiles (TSH vs T4 levels)
- Growth Hormone regulation and inhibition
NEET MDS LOGIC
Diagnostic interpretation of lab profiles and the mechanism of common systemic diseases are highly tested.
Framing: "What pattern of thyroid hormone levels is most consistent with dry skin, weight gain, fatigue, and puffiness around the eyes?"
Past Question Patterns
- NEET MDS 2026: The primary mechanism in Type 2 Diabetes Mellitus is (Peripheral insulin resistance).
- NEET MDS 2026: Growth hormone is NOT released during (Glucocorticoid therapy).
- NEET MDS 2021: A woman with weight gain, cold intolerance, and puffiness around the eyes will most likely show (High TSH, low T4).
- NEET MDS 2021: The highest peak in progesterone level is seen (Between ovulation and menstrual phase).
10. General Physiology
Core Focus
- Cell membrane transport (Active vs Passive, Facilitated)
- Cell junctions (Desmosomes, Tight junctions)
- Lipid bilayer permeability
NEET MDS LOGIC
The foundation of basic science. You must be able to differentiate between secondary active transport, facilitated diffusion, and simple diffusion.
Framing: "Identify the correct statement regarding cell membrane transport mechanisms:"
Past Question Patterns
- NEET MDS 2026: A substance which travels down its concentration gradient without ATP via a carrier is utilizing (Facilitated diffusion).
- NEET MDS 2024: Which among the following is NOT a cell-to-cell junction? (Hemidesmosomes).
- NEET MDS 2023: The lipid bilayer demonstrates (Selective permeability to lipid-soluble substances).
- NEET MDS 2020: Secondary active transport is also classically known as (Coupled transport).
TOPPER LOGIC FOR PHYSIOLOGY
In the CNS section, examiners absolutely love testing clinical localization (e.g., identifying Broca's vs Wernicke's aphasia, or the precise location of the gag reflex). For CVS and Renal, focus on regulatory formulas (Cardiac Output) and specific tubule functions (PCT vs Loop of Henle).
Updated Jun 22, 2026.
