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Date November 2020 Marks available 4 Reference code 20N.2.HL:.tz0.3
Level Higher Level Paper Paper 2 Time zone time zone 0
Command term Explain Question number 3 Adapted from N/A

Question

[Source: © International Baccalaureate Organization 2020.]

State the fitness test shown in the diagram.

[1]
a.

Identify the movement at the hip on moving from position A to position B.

[1]
b.

Using an example, define the anatomical term posterior.

[1]
c.

State the anatomical location of the iliopsoas.

[1]
d.

Explain the mechanics of inspiration for an athlete completing an aerobic fitness test.

[4]
e.

Markscheme

sit & reach test;

a.

flexion;

b.

towards the back/rear eg the vertebral column is posterior to the sternum;

c.

anterior of the hip;

d.

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.

e.

Examiners report

Generally answered well, although some candidates identified it as a flexibility test.

a.

Generally answered well, although some candidates were confused with extension.

b.

Overall answered well, although many candidates were able to outline posterior, many candidates struggled to provide a suitable example.

c.

Very few candidates were able to answer this question accurately.

d.

Overall many candidates were able to explain the mechanics of inspiration but very few candidates were able to link the mechanics to exercise.

e.

Syllabus sections

Topic 2: Exercise physiology » 2.1. Structure and function of the ventilatory system » 2.1.4. Explain the mechanics of ventilation in the human lungs.
Topic 2: Exercise physiology » 2.1. Structure and function of the ventilatory system
Topic 2: Exercise physiology

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