Jooo
1. The graph shows the pattern of breathing in a person sitting at rest.
(a) (i) What is the name given to the volume of air labelled A?
..........................................................................................................................
(1) (ii) Explain how you would calculate the volume of air taken into the lungs in one minute.
..........................................................................................................................
..........................................................................................................................
(1)
One way in which hospitals test how well the lungs are working is to measure the gas transfer factor. This is done by measuring the uptake of carbon monoxide from a single breath of air containing 0.3% carbon monoxide.
(b) (i) By what process would carbon monoxide pass from the air in the alveoli to the blood in the lung capillaries?
..........................................................................................................................
(1)
(ii) Suggest why carbon monoxide is used for this test.
..........................................................................................................................
..........................................................................................................................
..........................................................................................................................
..........................................................................................................................
(2)
(c) Interstitial lung disease is a disease in which the alveolar walls become thicker.
Explain why the gas transfer factor would be low in a person who had interstitial lung disease.
.....................................................................................................................................
(a) (i) What is the name given to the volume of air labelled A?
..........................................................................................................................
(1) (ii) Explain how you would calculate the volume of air taken into the lungs in one minute.
..........................................................................................................................
..........................................................................................................................
(1)
One way in which hospitals test how well the lungs are working is to measure the gas transfer factor. This is done by measuring the uptake of carbon monoxide from a single breath of air containing 0.3% carbon monoxide.
(b) (i) By what process would carbon monoxide pass from the air in the alveoli to the blood in the lung capillaries?
..........................................................................................................................
(1)
(ii) Suggest why carbon monoxide is used for this test.
..........................................................................................................................
..........................................................................................................................
..........................................................................................................................
..........................................................................................................................
(2)
(c) Interstitial lung disease is a disease in which the alveolar walls become thicker.
Explain why the gas transfer factor would be low in a person who had interstitial lung disease.
.....................................................................................................................................