1. What is the purpose of a double blind research trial? 2. What is a placebo and why is it used in some studies? 3. Using the heart and the lungs, show how you can apply your prior knowledge of...

1. What is the purpose of a double blind research trial?

2. What is a placebo and why is it used in some studies?

3. Using the heart and the lungs, show how you can apply your prior knowledge of anatomy and physiology to your study of pathophysiology. (Hint: Change part of the normal structure and predict the resulting loss of function.)