NEET Biology: Structure of human heart and blood vessels Practice Questions
15 free multiple-choice questions on Structure of human heart and blood vessels (Human Physiology) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The blood vessels supplying the cardiac muscle itself are primarily categorized as:
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Correct answer: B — Arteries
The coronary arteries supply oxygenated blood directly to the myocardium (heart muscle) via the coronary circulation.
Q2. In terms of blood vessel arrangement, which type of vessel typically exhibits a more uniform and less elastic structure?
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Correct answer: B — Veins
Veins generally have less elastic tissue and a more compliant structure compared to arteries, which is necessary for transporting blood back to the heart under lower pressure.
Q3. What is the primary structural difference between an artery and a vein regarding the thickness of their walls?
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Correct answer: A — Arteries generally have thicker walls (especially tunica media) than veins.
Arteries typically have thicker walls, particularly the tunica media, to withstand the high pressure of blood pumped by the heart, compared to veins.
Q4. Which structure separates the blood flow in arteries, ensuring unidirectional flow?
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Correct answer: D — Elastic fibers
While valves regulate flow in veins, in arteries, the muscular walls and elastic tissue ensure the blood moves forward efficiently under high pressure.
Q5. Which chamber of the human heart pumps oxygenated blood to the systemic circulation?
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Correct answer: C — Left ventricle
The Left Ventricle is the strongest chamber and pumps oxygenated blood into the systemic circulation (the rest of the body).
Q6. Which blood vessel layer is responsible for forming the innermost lining of the blood vessel?
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Correct answer: B — Tunica Intima
The tunica intima is the innermost layer of the blood vessel. It is crucial for regulating blood flow and is where the endothelium is located.
Q7. What is the name of the innermost layer of the blood vessel wall that is directly exposed to the blood?
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Correct answer: A — Tunica Intima
The Tunica Intima is the innermost layer, consisting of a single layer of endothelium, which lines the lumen of the blood vessel.
Q8. Which type of blood vessel typically carries oxygenated blood away from the heart to the rest of the body?
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Correct answer: A — Artery
Arteries are characterized by having thick, muscular walls to withstand high pressure and carry blood away from the heart.
Q9. The cardiac muscle tissue responsible for the pumping action of the heart is known as:
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Correct answer: B — Myocardium
The myocardium is the thick, muscular layer of the heart wall responsible for generating the force required to pump blood throughout the circulatory system.
Q10. Which blood vessel type is characterized by having the thinnest walls compared to arteries and veins?
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Correct answer: D — Capillaries
Capillaries have very thin walls (only one cell thick) which facilitate the exchange of nutrients and gases between blood and tissues.
Q11. Which type of valve is located between the right atrium and the right ventricle?
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Correct answer: C — Tricuspid valve
The Tricuspid valve controls the flow of blood from the right atrium to the right ventricle.
Q12. The outermost layer of a blood vessel, which anchors the vessel to surrounding tissues, is known as the:
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Correct answer: D — Tunica Adventitia
The Tunica Adventitia (or Externa) is the outermost layer, providing structural support and anchoring the vessel to surrounding tissues.
Q13. Which blood vessel carries deoxygenated blood from the heart to the lungs for oxygenation?
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Correct answer: A — Pulmonary artery
The Pulmonary artery carries deoxygenated blood from the right ventricle to the lungs.
Q14. Which layer of the blood vessel wall is primarily composed of elastic fibers, allowing the vessel to stretch and recoil?
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Correct answer: D — Tunica Media
The Tunica Media of the blood vessel wall is rich in smooth muscle and elastic fibers, which provide the vessel with elasticity to regulate blood pressure and accommodate changes in flow.
Q15. Which component of the blood vessel wall is primarily responsible for vasoconstriction and vasodilation?
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Correct answer: A — Tunica Media
The Tunica Media, containing smooth muscle, is responsible for regulating the diameter of the vessel through contraction and relaxation (vasoconstriction and vasodilation).
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