| Date | November 2021 | Marks available | 1 | Reference code | 21N.1.SL.tz0.4 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 4 | Adapted from | N/A |
Question
Which four are principal structures of the ventilatory system?
Markscheme
C
Examiners report
Seen as an easy question. The distracting features (epiphysis, nucleus) in the wrong answers do stand out a little.
