Chapter 21.7, Problem 20CYU

The dotted lines in the two graphs below represent a shift in the oxygen-hemoglobin dissociation curve. Which shift would allow more oxygen delivery to the tissues? [Hint: Ask yourself which curve allows Hb to “let go” of more ${\text{O}}_{\text{2}}$(hold less ${\text{O}}_{\text{2}}$).] Name three conditions in the tissues that would cause the curve to shift this way.