A-LevelBiologyGas exchange9700/12 · Feb/Mar 2025 · Q321 Mark

The scanning electron micrograph shows the inner surface of a human trachea. [Figure 32.1] What is the identity of the part of the electron micrograph labelled T?

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Aciliated epithelial cell

Bgoblet cell

Cmucus

Dsquamous epithelial cell

✓ Correct answer

B: goblet cell

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Topic: Gas exchange, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Feb/Mar 2025 Paper 1 Variant 2, question 32.

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