Question at position 22 In the pulmonary circut, pulmonary arteries carry blood that is ___________ in oxygen to the lungs for gas exchange.SaturatedLowHighNeutral单项选择题
A
Saturated
B
Low
C
High
D
Neutral

Question

Question at position 22 In the pulmonary circut, pulmonary arteries carry blood that is ___________ in oxygen to the lungs for gas exchange.SaturatedLowHighNeutral

BlackTom AI · Accepted Answer

Question restatement: In the pulmonary circuit, pulmonary arteries carry blood that is ___________ in oxygen to the lungs for gas exchange. Options: Saturated, Low, High, Neutral.

Option 1: Saturated. This would imply blood holds a high concentration of oxygen in the pulmonary arteries, but the pulmonary arteries actually deliver blood low in oxygen to the lungs and pick up oxygen there. Therefore, describing the blood as saturated is incorrect and conflicts with the oxygen-poor status of blood entering the lungs via the pulmonary arteries.

Option 2: Low. This matches the physiological reality: the right ventricle sends deoxygenated blood into the pulmonary arteries, which travel to the lungs to release carbon dioxide and absorb oxygen, resulting in blood that becomes oxygenated. Thus, 'Low' accurately characterizes the oxygen content of blood in the pulmonary arteries.

Option 3: High. Claiming that pulmonary arterial blood is high in oxygen contradicts the essential function of the pulmonary circulation, which is to carry deoxygenated blood from the heart to the lungs for gas exchange. Describing it as high in oxygen would be factually wrong.

Option 4: Neutral. 'Neutral' in this context is vague and non-specific; blood in the pulmonary arteries is not neutral with respect to oxygen content—it's specifically low in oxygen. Therefore, this option does not appropriately describe the blood's oxygen level.

Summary: The statement that aligns with pulmonary circulation physiology is that the blood in the pulmonary arteries is Low in oxygen, because these arteries transport deoxygenated blood to the lungs for gas exchange, whereas the subsequent pulmonary veins return oxygenated blood to the heart.

Question at position 22 In the pulmonary circut, pulmonary arteries carry blood that is ___________ in oxygen to the lungs for gas exchange.SaturatedLowHighNeutral单项选择题

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