| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.SL.TZ2.27 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Determine | Question number | 27 | Adapted from | N/A |
Question
Which of the following features of the alveoli adapt them to gaseous exchange?
I. Single layer of cells
II. Film of moisture
III. Dense network of capillaries
A. I and II only
B. II only
C. II and III only
D. I, II and III
Markscheme
D
Examiners report
It has been suggested that the question should have mentioned that the alveoli have a wall of single layer of cells, it was felt that this would have only complicated the question.
Syllabus sections
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