Which of these prostheses is used to support blood flow through an artery?A.A nanotubeB.A stentC.A passive prosthesisD.A pacemaker

Analysis of Options

1. A. A nanotube: Nanotubes are generally used in various applications including drug delivery and materials science, but they are not specifically designed for supporting blood flow in arteries.

2. B. A stent: A stent is a small tube-like device that is inserted into an artery to keep it open and allow blood to flow through more freely. This is a common procedure for treating narrowed or blocked arteries.

3. C. A passive prosthesis: This term typically refers to devices that do not actively function to support bodily functions but rather replace or support structure. They don’t actively facilitate blood flow.

4. D. A pacemaker: A pacemaker is a device that helps manage heart rhythms, but it does not directly support blood flow through an artery.

Final Answer

The correct answer is B. A stent, as it is specifically designed to support and improve blood flow through an artery.