Fig. 1.1 shows a section through the human chest. The gross structure of the human gas exchange system is shown. [Figure 1.1]

1. (a)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 name of part of gas exchange letter from Fig. 1.1 description system 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[4]
2. (b)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.[5]

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