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GATE 2023 BM – Question 21

Mammalian Cell Biology, Human Anatomy and Physiology · Circulatory System · 1 mark · Multiple choice

Which describes the oxygenation of blood in the pulmonary artery and pulmonary vein, respectively, in normal postnatal circulation?

  1. Deoxygenated and oxygenated
  2. Oxygenated and deoxygenated
  3. Both oxygenated
  4. Both deoxygenated

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Correct answer: (A) Deoxygenated and oxygenated

Explanation

The pulmonary artery carries relatively deoxygenated blood from the right ventricle to the lungs. Pulmonary veins return oxygenated blood from the lungs to the left atrium. Artery and vein refer to direction relative to the heart rather than oxygen content. Therefore A.

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