Gas Transport in the Blood II: Carbon Dioxide

Practice: A 6-year-old boy gets very angry at his parents because he is only allowed to have four Reese’s Peanut Butter Cups after dinner (he wants six—one for each year of his life). In protest, he threatens to hold his breath until he passes out. He starts to hold his breath, causing CO₂ to accumulate in his bloodstream. Which of the following forms of CO₂ will accumulate to the highest levels in his blood?

Practice: In which type of blood vessel is [Cl- ]_plasma lowest?