Refer to the Graph

Multiple Choice

Refer to the graph. When you are lying on the couch, point _______ on the graph would best represent the PO₂ in your leg muscles.When you have been running hard on a treadmill for 30 minutes, point _______ on the graph would best represent the PO₂ in your leg muscles.Oxygen is being released faster to your leg muscles when their PO₂ is at point _______ than when it is at either of the other two points on the graph.

A) A, B, B
B) B, C, B
C) B, A, A
D) C, B, B
E) C, A, A