Plaque forms when cholesterol lodges in the wall of the artery. Muscle cells in the artery wall are triggered to multiply and form a thin cap over the area, but the soft plaque beneath the cap can...

Extracted text: Plaque forms when cholesterol lodges in the wall of the artery. Muscle cells in the artery wall are triggered to multiply and form a thin cap over the area, but the soft plaque beneath the cap can burst through the thin wall of the plaque, which can break open, forming a clot that can cause a heart attack. Data for a normal 3mm diameter artery is: blood flow velocity = 23 cm s 1 and kinematic viscosity of blood at 37°C n = 1.06 x 10-6 m2s-1. A similar artery has been found with plaque, reducing the vessel diameter by one third, and increasing the blood velocity to 120 cm s 1. You determine that: O The normal artery experiences turbulent flow but the plaque causes laminar flow O The normal artery experiences laminar flow but the plaque causes turbulent flow O Both experience turbulent flow O Both experience laminar flow