A-LevelBiologyGas exchange9700/12 · May/June 2016 · Q321 Mark
A student was asked to describe the differences between four microscope slides of sections taken from different parts of the gas exchange system. slide 1 not present: cartilage, glands present: few goblet cells, ciliated epithelial cells, smooth muscle slide 2 present: incomplete cartilage rings, glands, goblet cells, ciliated epithelial cells, smooth muscle slide 3 not present: cartilage, glands, goblet cells, smooth muscle present: squamous epithelial cells slide 4 present: plates of cartilage, glands, goblet cells, ciliated epithelial cells, smooth muscle Which is the correct identification of the parts of the gas exchange system?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Aslide 1: alveolus, slide 2: bronchiole, slide 3: bronchus, slide 4: trachea
Bslide 1: bronchiole, slide 2: bronchus, slide 3: alveolus, slide 4: trachea
Cslide 1: bronchiole, slide 2: trachea, slide 3: alveolus, slide 4: bronchus
Dslide 1: bronchus, slide 2: trachea, slide 3: bronchiole, slide 4: alveolus
✓ Correct answer
C: slide 1: bronchiole, slide 2: trachea, slide 3: alveolus, slide 4: bronchus
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Gas exchange and see which topics are most likely to come up next.
Sign up free →