CAPE Biology Unit 2 · 2015 · Paper 1 · Question Q23

During cycling, the partial pressure of oxygen found in the pulmonary vein leaving the lungs and in a vein leaving a muscle is MOST likely

1. (A)\text{pO}_2 \text{ (kPa) in Pulmonary Vein Leaving Lungs} = 0, \text{pO}_2 \text{ (kPa) in Vein Leaving Muscle} = 12
2. (B)\text{pO}_2 \text{ (kPa) in Pulmonary Vein Leaving Lungs} = 2, \text{pO}_2 \text{ (kPa) in Vein Leaving Muscle} = 12
3. (C)\text{pO}_2 \text{ (kPa) in Pulmonary Vein Leaving Lungs} = 6, \text{pO}_2 \text{ (kPa) in Vein Leaving Muscle} = 6
4. (D)\text{pO}_2 \text{ (kPa) in Pulmonary Vein Leaving Lungs} = 12, \text{pO}_2 \text{ (kPa) in Vein Leaving Muscle} = 2

This question uses a figure or table from the paper — you'll see it when you practise.