Biology 9700/23 — October/November 2020
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Gas Exchange · Transport in Plants · The Mitotic Cell Cycle · Infectious Diseases · Immunity · Biological Molecules · +3 more
Fig. 1.1 shows a section through the human chest. The gross structure of the human gas exchange system is shown.
Fig. 1.1
Descriptions of some parts of the gas exchange system are shown in Table 1.1.
Complete Table 1.1 to:
- state the name of the part described
- write a letter from Fig. 1.1 to identify each part.
Table 1.1
| description | name of part of gas exchange system | letter from Fig. 1.1 |
|---|---|---|
| supported by incomplete (C-shaped) rings of cartilage | ||
| lined by ciliated epithelium and supported by blocks of cartilage | ||
| lined by squamous epithelium | ||
| lined by ciliated epithelium, but not supported by cartilage |
Tobacco smoke contains a number of compounds which can affect the body.
State the appropriate term that matches each of the statements A to E.
A The type of chemical that causes mutation of genes that control the cell cycle.
B A component that causes a short-term increase in blood pressure.
C A component that reduces the carrying capacity of haemoglobin for oxygen.
D A component that increases the production and secretion of mucus from goblet cells.
E A component that causes a short-term increase in heart rate.
The rest of this paper
5 more questions- Q2Transport in Plants8M
- Q3The Mitotic Cell Cycle10M
- Q4Infectious Diseases · Immunity6M
- Q5Biological Molecules · Enzymes18M
- Q6Cell Structure · Cell Membranes and Transport9M