| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.HL.TZ1.23 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Identify | Question number | 23 | Adapted from | N/A |
Question
Which muscles contract to cause air to pass into the lungs through the trachea?
A. Internal intercostal muscles and diaphragm
B. Internal intercostal muscles and abdomen wall muscles
C. External intercostal muscles and diaphragm
D. External intercostal muscles and abdomen wall muscles
Markscheme
C
Examiners report
The guide clearly states that intercostal muscle function in breathing has to be known.
Syllabus sections
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