Biology 9700/23 — May/June 2016
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Transport in Mammals · Gas Exchange · Cell Structure · The Mitotic Cell Cycle · Enzymes · Biological Molecules · +5 more
Fig. 1.1 is a photomicrograph of epithelial cells in the bronchus.
Fig. 1.1
Write a letter X on Fig. 1.1 to show the lumen of the bronchus.
Name the structure in Fig. 1.1 labelled A.
State one feature of the cells, visible in Fig. 1.1, which indicates that these are not epithelial cells from the alveolus.
Epithelial cells are replaced when they are damaged.
Name the type of cell division used to replace damaged epithelial cells.
The cells shown in Fig. 1.1 are from a non-smoker.
Smoking causes damage to the epithelial cells of the lungs.
Describe the appearance of the lining of the bronchus in a long-term smoker.
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