CARBON DIOXIDE TRANSPORT

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5 Terms

1
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In what three ways is carbon dioxide transported in the blood?

About 90% is converted to bicarbonate, 5% is bound to hemoglobin, and 5% is dissolved in plasma.

2
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What is the chemical reaction for CO₂ transport as bicarbonate?

CO₂ + H₂O ⇌ H₂CO₃ ⇌ HCO₃⁻ + H⁺

3
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What enzyme speeds up the conversion of CO₂ in red blood cells?

Carbonic anhydrase.

4
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What is the chloride shift?

It is the exchange of bicarbonate ions out of the RBC for chloride ions into the RBC.

5
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How does CO₂ loading promote oxygen unloading?

Hydrogen ions from carbonic acid bind to hemoglobin, reducing its affinity for oxygen and promoting oxygen release.