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ADA NBDE National Board Dental Part I

Category - NBDE

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Which of the following changes occurs as blood passes through pulmonary capillaries?

The oxygen/hemoglobin dissociation curve shifts to the right
The pH of the blood becomes more acidic
There is a net movement of bicarbonate ions from plasma to erythrocytes
There is a net movement of Cl− from plasma to erythrocytes

Explanation

Answer: C - A carrier protein, present in the red cell membrane, transports bicarbonate ions from plasma to erythrocytes, which provides bicarbonate to sustain the CO2-generating reaction.

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ADA NBDE National Board Dental Part I

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ADA NBDE National Board Dental Part I

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