Human Physiology is one of the most important and scoring units in NEET Biology. Every year, a significant number of questions are directly asked from NCERT concepts, making it a high-return topic for aspirants. In this article on Top 5 Human Physiology Questions for NEET, we will cover the most repeated previous year questions (PYQs) along with clear explanations to strengthen your conceptual understanding and boost your exam performance.
Why Focus on Top 5 Human Physiology Questions for NEET?
The unit of Human Physiology consistently contributes around 15–20 questions in NEET. Most questions are either direct NCERT-based or concept-driven. Practicing the Top 5 Human Physiology Questions for NEET ensures that you cover the most frequently tested areas such as digestion, circulation, neural control, and hormones.
Question 1: Cardiac Cycle and Heart Sounds
Question:
Which of the following events is responsible for the first heart sound (lub)?
Options:
A. Closure of semilunar valves
B. Closure of atrioventricular valves
C. Opening of semilunar valves
D. Opening of atrioventricular valves
Correct Answer: B. Closure of atrioventricular valves
Explanation:
The first heart sound, commonly known as “lub,” is produced due to the closure of the atrioventricular (AV) valves (tricuspid and bicuspid/mitral valves) at the beginning of ventricular systole. This is a very commonly asked concept in the Top 5 Human Physiology Questions for NEET, and students often confuse it with semilunar valve closure, which actually produces the second heart sound (“dub”).
Question 2: Oxygen Dissociation Curve
Question:
A shift of the oxygen dissociation curve to the right indicates:
Options:
A. Increased affinity of hemoglobin for oxygen
B. Decreased oxygen release
C. Increased oxygen delivery to tissues
D. Decreased carbon dioxide levels
Correct Answer: C. Increased oxygen delivery to tissues
Explanation:
A rightward shift of the oxygen dissociation curve indicates decreased affinity of hemoglobin for oxygen, facilitating the release of oxygen to tissues. This occurs during increased CO₂ levels, higher temperature, or lower pH (Bohr effect). Questions like this are frequently included in the Top 5 Human Physiology Questions for NEET, especially from respiration.
Question 3: Role of Juxtaglomerular Apparatus (JGA)
Question:
The juxtaglomerular apparatus (JGA) helps regulate:
Options:
A. Blood glucose levels
B. Blood pressure and glomerular filtration rate
C. Oxygen transport
D. Digestion
Correct Answer: B. Blood pressure and glomerular filtration rate
Explanation:
The JGA is a specialized structure in the kidney that regulates blood pressure and GFR through the renin-angiotensin mechanism. It plays a crucial role in maintaining homeostasis. This concept is repeatedly tested, making it essential in the Top 5 Human Physiology Questions for NEET.
Question 4: Synaptic Transmission
Question:
Which neurotransmitter is primarily involved in neuromuscular junctions?
Options:
A. Dopamine
B. Serotonin
C. Acetylcholine
D. GABA
Correct Answer: C. Acetylcholine
Explanation:
Acetylcholine is the neurotransmitter released at neuromuscular junctions, enabling muscle contraction. It binds to receptors on muscle fibers, initiating depolarization. Questions from neural control and coordination are very common in the Top 5 Human Physiology Questions for NEET, especially related to neurotransmitters.
Question 5: Hormonal Control – Feedback Mechanism
Question:
Which hormone regulates the secretion of thyroxine through a feedback mechanism?
Options:
A. ACTH
B. TSH
C. FSH
D. LH
Correct Answer: B. TSH
Explanation:
Thyroid-stimulating hormone (TSH), released by the pituitary gland, regulates the secretion of thyroxine from the thyroid gland. This operates via a negative feedback mechanism involving the hypothalamus and pituitary. Endocrine system questions are consistently featured in the Top 5 Human Physiology Questions for NEET, making them crucial for preparation.
Key Takeaways from Top 5 Human Physiology Questions for NEET
Practicing the Top 5 Human Physiology Questions for NEET highlights some important preparation strategies. First, NCERT remains the backbone—many questions are directly derived from it. Second, understanding concepts like cardiac cycle, oxygen transport, kidney function, neural transmission, and hormonal regulation is essential. Lastly, repeated revision of these high-yield topics can significantly improve accuracy and confidence in the exam.
Preparation Tips for Human Physiology
To master the Top 5 Human Physiology Questions for NEET, focus on clarity rather than rote memorization. Revise diagrams from NCERT, especially for heart, nephron, and brain structures. Practice PYQs regularly, as patterns often repeat. Make short notes for hormones, enzymes, and physiological processes to enable quick revision before the exam.
FAQs on Top 5 Human Physiology Questions for NEET
Q1. How many questions come from Human Physiology in NEET?
Around 15–20 questions are asked, making it one of the most important units.
Q2. Are NCERT lines enough for Human Physiology?
Yes, most questions are directly or indirectly based on NCERT, but conceptual clarity is also required.
Q3. Which topics are most important in Human Physiology?
Circulation, respiration, excretion, neural control, and hormones are the most frequently asked.
Q4. How should I revise Human Physiology quickly?
Focus on diagrams, flowcharts, and key concepts. Revise PYQs like the Top 5 Human Physiology Questions for NEET regularly.