All of the follwing are blood clots except:___________?
Correct answer: C. Atheroma
- A. Thrombus
- B. Embolus
- C. Atheroma
- D. Hematoma
Explanation
An atheroma is a fatty, cholesterol-rich plaque in an arterial wall, not a blood clot. Students may choose an embolus because it can block a vessel, but an embolus is often a travelling clot or other material, whereas an atheroma is a plaque.
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Blood vessels include arteries, arterioles, capillaries, venules and veins, whose wall thickness, elasticity, lumen size and valves suit their roles in circulation. Questions compare pressure and blood flow in each vessel and distinguish pulmonary vessels, which carry blood to and from the lungs, from systemic vessels.
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