Using the oxygen binding curve shown, calculate the approximate percentage of O₂ that is released from hemoglobin as the pO₂ changes from 13 kPa to 4 kPa. A) 4% B) 9% C) 60% D) 91%

Question

Quizplus · Accepted Answer

First, locate the points on the oxygen binding curve where pO2 changes from 13 kPa to 4 kPa. This is approximately between 50% and 10% saturation, respectively. Then, calculate the difference in saturation between these two points. From the graph, it appears to be approximately 50%. Therefore, approximately 60% (100% - 50%) of O₂ is released from hemoglobin as pO2 decreases from 13 kPa to 4 kPa.

Using the Oxygen Binding Curve Shown, Calculate the Approximate Percentage