IG+Gas+Exchange+Qs

Back to gas exchange

1. Use the following key terms to outline gas exchange (9 marks): Oxygen, alveoli, moist lining, dissolve, capillary, diffuse, concentration gradient, carbon dioxide, blood

2. On the diagram below (11 marks):

a. label the following parts: ribs, intercostal muscles, diaphragm, trachea, bronchi, bronchioles, alveoli, thorax, abdomen, lung b. add a label line to indicate the pleural membrane



3. Describe the process of breathing in terms of the movement of the diaphragm and the intercostal muscles. Complete the table below (8 marks):


 * || Inhaling || Exhaling ||
 * Intercostal muscles ||  ||   ||
 * Diaphragm ||  ||   ||
 * Volume of lungs ||  ||   ||
 * Pressure in the lungs ||  ||   ||
 * Direction of air movement ||  ||   ||

4. Outline how does smoking tobacco affect the lungs and the circulatory system (10 marks).