Question

Which of the following factors does not induce left shift (dotted lines) as shown in the following graph?

• A. Decreased pH
• B. Decreased temperature
• C. Decreased 2,3 DPG
• D. Decreased PPCO₂

Answer 1

The correct option is A

Decreased pH

The dotted red line represents the curve in the blood at the lungs, shifted to the left to the normal curve:
Higher $PC{O}_2$ = Higher [H+] = Lower pH = Shift to the RIGHT

Lower $PC{O}_2$ = Lower [H+] = Higher pH = Shift to the LEFT