11B Paper 2 Gas Exchange

1. Fig. 1.1 is an image of a transverse section through the trachea of the gas exchange system.

Identify the part labeled B.

Identify the part labeled D.

1. Fig. 5.1 is a photomicrograph of a transverse section through part of the bronchus of the human gas exchange system. The image is of a good resolution for a light microscope. The bronchial epithelium is a single layer of cells lining the lumen of the bronchus.

Identify the part labelled C.

1. Fig. 5.1 is a photomicrograph of a transverse section through part of the bronchus of the human gas exchange system. The image is of a good resolution for a light microscope. The bronchial epithelium is a single layer of cells lining the lumen of the bronchus.

Identify the part labelled A.

1. Fig. 4.1 is a photomicrograph of a section through a bronchiole, which is surrounded by alveoli. 

Identify the part labelled A.

1. Fig. 1.1 is an image of a transverse section through the trachea of the gas exchange system.

3. The perichondrium contains collagen fibres, composed of collagen molecules. Collagen is an example of one type of biological molecule.

State the name of the type of biological molecule of which collagen is an example.

1. Fig. 1.1 is an image of a transverse section through the trachea of the gas exchange system.

Identify the part labeled D.

1. Fig. 5.1 is a photomicrograph of a transverse section through part of the bronchus of the human gas exchange system. The image is of a good resolution for a light microscope. The bronchial epithelium is a single layer of cells lining the lumen of the bronchus.

Identify the part labelled D.

1. Fig. 1.1 is an image of a transverse section through the trachea of the gas exchange system.

Identify the part labeled A.

1. Fig. 5.1 is a photomicrograph of a transverse section through part of the bronchus of the human gas exchange system. The image is of a good resolution for a light microscope. The bronchial epithelium is a single layer of cells lining the lumen of the bronchus.

Identify the part labelled H.