Pharmacology Atherosclerosis impedes coronary blood flow by which of the following mechanisms? A Plaques obstruct the vein B Plaques obstruct the artery C Blood clots form outside the vessel wall D Hardened vessels dilate to allow blood to flow through 💡 Explanation Atherosclerosis impedes coronary blood flow by which of the following mechanisms? ✓ Correct Answer: B. Plaques obstruct the artery