NEET Biology: Double circulation Practice Questions
15 free multiple-choice questions on Double circulation (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 flow in the pulmonary circulation is responsible for which physiological process?
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Correct answer: A — Exchange of oxygen and carbon dioxide
The pulmonary circulation facilitates the exchange of gases (oxygenation) between blood and air in the lungs.
Q2. In the pulmonary circulation, blood flows from the heart to the lungs and returns to the heart. What is the primary function of the pulmonary circuit?
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Correct answer: B — To facilitate the exchange of gases (oxygen and carbon dioxide) in the lungs.
The primary function of the pulmonary circuit is to carry deoxygenated blood to the lungs where gas exchange occurs (CO2 is released and O2 is absorbed), and then return the newly oxygenated blood to the heart.
Q3. Which blood vessel carries deoxygenated blood from the body tissues back to the heart?
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Correct answer: A — Vena Cava
The Vena Cavae (Superior and Inferior) are the large veins that collect deoxygenated blood from the systemic circulation and return it to the Right Atrium.
Q4. Which circuit involves the flow of blood between the heart and the lungs?
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Correct answer: C — Pulmonary circuit
The Pulmonary circuit is the circuit that carries deoxygenated blood from the right side of the heart to the lungs and oxygenated blood back to the left side of the heart.
Q5. Which circuit of the double circulation system involves the exchange of gases (oxygenation)?
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Correct answer: D — Pulmonary circuit
The pulmonary circuit carries blood between the heart and the lungs for gas exchange.
Q6. In the double circulation, the blood returning from the body enters the heart via which large veins?
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Correct answer: B — Vena cava
Deoxygenated blood from the body enters the heart via the superior and inferior vena cava.
Q7. Which chamber of the human heart pumps oxygenated blood to the rest of the body via the systemic circulation?
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Correct answer: C — Left Ventricle
The Left Ventricle is responsible for generating the high pressure required to pump oxygenated blood into the systemic circulation (the body).
Q8. The blood flowing through the pulmonary circulation is characterized by:
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Correct answer: B — moving blood from the heart to the lungs
The pulmonary circulation is the circuit that carries deoxygenated blood from the right ventricle to the lungs for oxygenation and returns oxygenated blood to the left atrium.
Q9. Which type of blood flow is characterized by blood moving from the heart to the lungs?
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Correct answer: A — Pulmonary flow
Pulmonary flow specifically refers to the circulation pathway involving the lungs (pulmonary circuit).
Q10. Which circuit of the circulatory system carries deoxygenated blood from the right ventricle to the lungs and back to the left atrium?
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Correct answer: A — Pulmonary circuit
The pulmonary circuit is responsible for transporting deoxygenated blood from the right side of the heart to the lungs for oxygenation and returning oxygenated blood to the left side of the heart.
Q11. Blood flowing through the pulmonary circulation is characterized by carrying:
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Correct answer: C — Deoxygenated blood
The pulmonary circulation carries deoxygenated blood from the heart to the lungs to pick up oxygen and then carries oxygenated blood back to the heart.
Q12. Which chamber of the heart pumps oxygenated blood to the rest of the body via the systemic circulation?
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Correct answer: A — Left Ventricle
The Left Ventricle has the thickest muscular wall because it must generate the highest pressure to pump oxygenated blood into the systemic circulation (the body).
Q13. The flow of blood from the right ventricle is directed towards which circuit?
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Correct answer: A — Pulmonary circuit
Blood pumped from the Right Ventricle enters the Pulmonary Circuit, which involves the lungs for oxygenation.
Q14. Which vessel carries deoxygenated blood from the right side of the heart to the lungs?
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Correct answer: C — Pulmonary Artery
The Pulmonary Artery carries deoxygenated blood from the right ventricle to the pulmonary circulation (lungs).
Q15. What is the primary function of the semilunar valves (aortic and pulmonary valves) in the heart?
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Correct answer: B — To prevent backflow of blood into the ventricles
Semilunar valves ensure that blood flows in only one direction—from the ventricles into the major arteries (aorta and pulmonary artery) and prevent backflow.
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