AS Gas exchange

Identify the structure in the image

How thick are the cells forming the epithelium of the wall of an alveolus?

• 5 nm

• 50 nm

• 0.5 µm

• 5 µm

Bronchioles are surrounded by which type of muscle that can contract or relax to adjust diameter of airway?

• Cardiac

• Striated

• Smooth

• Myogenic

What type of epithelial cells make up the lining of the trachea and bronchi?

State the type of cell that produces and secretes mucus

Identify the structure in the image

• Larynx

• Alveolus

• Bronchiole

• Trachea

State the term for the whip like structures that beat to cause the movement of fluid across the cell surface

Small amounts of which protein prevent an alveolus from bursting when it stretches?

• Elastin

• Fibrinogen

• Fibrin

• Collagen

Mucin consists mainly of which substance?

Identify the tissue in the wall of trachea and bronchi that keeps the air way open

• Smooth muscle

• Cartilage

• Bone

• Mucosa