Each question is worth 5 marks. These questions are NOT open book
1. When air is drawn into the lung
a. What happens to the ribs and diaphragm and how does this effect the overall volume of the thoracic cavity?
b What is the function of the pleural membranes?
2. What are the two chemoreceptors which regulate breathing and tell your diaphragm to contract? Using a drawing, explain how the chemoreceptors work to increase breathing rate.
3. Write about a lung disease of your choice
4. Using drawings, to illustrate your answer, write the equation for the carbonic acid buffer below and state which way equilibrium moves and also how hemoglobin picks up and drops off oxygen, carbon dioxide and Hydrogen ion in the following locations:
a. at the tissue
b. in the blood
c. in the lung
5. What are the three forms of hemoglobin?
6. What environmental conditions cause carbaminohemoglobin and reduced hemoglobin to drop their load of carbon dioxide and H+ ions and pick up oxygen?
7. Draw a graph illustrating
a. how pH affects oxygen binding to hemoglobin
b. how temp affects oxygen binding to hemoglobin
