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PTECH Physiology QUESTION #3197
Question 1
How is the majority of Carbon Dioxide ($CO_2$) transported in the blood?
  • Dissolved in plasma
  • Bound to hemoglobin
  • As Bicarbonate ions ($HCO_3^-$)✔️
  • As gas bubbles
Correct Answer Explanation
About $70\%$ of $CO_2$ is transported as bicarbonate, aided by the enzyme carbonic anhydrase.