LABORATORY REVIEW
PHYSIOLOGY OF THE CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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high in oxygen, low in carbon dioxide
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high in oxygen, high in carbon dioxide
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low in oxygen, low in carbon dioxide
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low in oxygen, high in carbon dioxide
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Detailed explanation-1: -Two pulmonary veins come from each lung and pass O2 rich blood to left atrium. Thus blood in pulmonary arteries is oxygen deficient but rich in carbon dioxide as compared to that of pulmonary veins.
Detailed explanation-2: -A crucial difference is that your pulmonary artery carries oxygen-poor (deoxygenated) blood, while your aorta carries oxygen-rich (oxygenated) blood. In fact, your pulmonary arteries are the only arteries in your body that carry oxygen-poor blood.
Detailed explanation-3: -A vein is a blood vessel that transports blood from all parts of the body to the heart. They carry deoxygenated blood back from the body to the heart. Pulmonary artey carries blood which is rich in carbon dioxide from the right ventricle of the heart to the lungs for oxygenation. Q.
Detailed explanation-4: -Pulmonary artery is the only artery that carries carbon dioxide rich blood to lungs for re-oxygenation. Since pulmonary artery carries blood away from the heart, it is called artery and not a vein.
Detailed explanation-5: -The answer is b. Pulmonary arteries carry venous blood (deoxygenated blood) to the lungs for reoxygenation. The partial pressure of carbon dioxide is higher in venous blood because carbon dioxide is produced in peripheral tissue as a product of metabolism.