8.1 - 2016 June Q11 Answers
The diagram shows the human breathing system.
(a) Name the structures A and B.
(b) The table gives data for athletes running races of different distances.
(b) The table gives data for athletes running races of different distances.
(i) The oxygen debt is the difference between the amount of oxygen needed and the amount of oxygen taken into the blood. Calculate the oxygen debt for an athlete running a 10 000m race. Show your working. (2)
Oxygen debt: ..... dm3
(ii) Name a waste product only produced during the period of the oxygen debt. (1)
(iii) Explain why the time taken to repay the oxygen debt will be greater for an athlete running a 10 000m race than for an athlete running a 100m race. (1)
Oxygen debt: ..... dm3
(ii) Name a waste product only produced during the period of the oxygen debt. (1)
(iii) Explain why the time taken to repay the oxygen debt will be greater for an athlete running a 10 000m race than for an athlete running a 100m race. (1)