Blood Plasma · Histology

The concentration of which gas is highest in the plasma arriving at the pulmonary capillaries from the right ventricle?

  1. Oxygen
  2. Carbon dioxide
  3. Nitrogen
  4. Carbon monoxide
Show answer and explanation

Correct answer: Carbon dioxide

Blood arriving at the lungs is deoxygenated and carries a high load of carbon dioxide, mostly in the form of bicarbonate ions dissolved in the plasma. This allows for CO2 to be exhaled.

Difficulty: Medium Question 18 of 20

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