| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.SL.TZ0.26 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 26 | Adapted from | N/A |
Question
Which statement describes the movements of the rib cage during inhalation of air?
A. External intercostal muscles contract moving the ribs up and outwards.
B. Internal intercostal muscles contract moving the ribs down and inwards.
C. External intercostal muscles relax moving ribs down and inwards.
D. Internal intercostal muscles relax moving ribs up and outwards.
Markscheme
A
Examiners report
N/A
Syllabus sections
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