Most O2 is carried in the blood ________; but most CO2 is ________.

A. dissolved in plasma; associated with salt or acid
B. bound to hemoglobin; associated with bicarbonate ions in the plasma
C. bound to plasma proteins; carried as CO2
D. combined with albumin; associated with carbonic acid
E. bound to hemoglobin; bound to albumin


Answer: B

Anatomy & Physiology

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