| Date | November 2020 | Marks available | 1 | Reference code | 20N.2.SL.tz0.3 |
| Level | Standard Level | Paper | Paper 2 | Time zone | time zone 0 |
| Command term | State | Question number | 3 | Adapted from | N/A |
Question
[Source: © International Baccalaureate Organization 2020.]
State the fitness test shown in the diagram.
Identify the movement at the hip on moving from position A to position B.
Explain the mechanics of inspiration for an athlete completing an aerobic fitness test.
Markscheme
sit & reach test;
flexion;
diaphragm and <external> intercostal muscles contract <more forcefully>;
causing the rib cage to move <further> upwards and outwards;
with assistance of the accessory muscles, eg deltoids, pectoralis;
therefore increasing the thoracic volume;
therefore reducing the thoracic pressure;
causes air to rush in <faster due to a greater pressure difference>;
increase of the depth of inhalation <per breath>;
increase of the frequency/rate of inhalation <per minute>;
Award [3] max if the student does not refer to the effect of exercise on the mechanism of inspiration.
Examiners report
Generally answered correctly.
Generally answered correctly.
Many students answered this question well enough to get 2 marks and a good number of students achieved the full marks. This topic (the effect of exercise on ventilation) has been asked repeatedly, in various ways in recent sessions and students are answering it much better.
