Answer to Question 1
Correct Answer: 4
Rationale: The coronary arteries arise from the base of the heart.
Answer to Question 2
Correct Answer: 4
Rationale: Atherosclerotic plaque builds up inside of blood vessels that supply heart tissue oxygen-rich blood. When the blood flow is blocked, the myocardium is damaged. Atherosclerotic plaque does damage the elasticity of blood vessels, but this is less likely to produce a myocardial infarction. Atherosclerotic plaque can result in a myocardial infarction when blocked by 50, but more likely it will not. Atherosclerotic plaque builds up in blood vessels, not in heart chambers. (p. 339)