Multiple choice

Blood possesses CO2 In the form

  1. NaHCO3

  2. H2C O3

  3. HbCO2

  4. HbCO2 & HbCO
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

CO2 is transported in blood as carbaminohemoglobin (HbCO2) when bound to hemoglobin's amino groups. This accounts for about 20-30% of CO2 transport. NaHCO3 (sodium bicarbonate) is the main transport form (70%), H2CO3 is carbonic acid (transient), and HbCO is carbon monoxide bound to hemoglobin (a toxin, not normal CO2 transport).

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