A) increases 2,3-DPG production in blood.
B) shifts the HbO₂ dissociation curve to the left.
C) can be caused by anemia.
D) increases 2,3-DPG production in blood and can result from anemia.
E) All of the answers are correct.

A) increased H⁺ concentration
B) increased pH
C) decreased temperature
D) decreased CO₂
E) None of the answers are correct.

A) dissolved in plasma.
B) bound to hemoglobin.
C) in ionic form as solute in the plasma.
D) bound to a plasma protein.
E) carried by white blood cells.