What is the main difference in the chloride shift near tissues versus near lungs?

• A. Near tissues, CO2 is converted to bicarbonate; near lungs, bicarbonate is converted to CO2.
• B. Near tissues, bicarbonate exits the cell; near lungs, bicarbonate enters the cell.
• C. Near tissues, chloride enters the cell; near lungs, chloride exits the cell.
• D. Near tissues, oxygen is transported; near lungs, CO2 is transported.

Answer: (B)