A nurse in Kingston, Jamaica is taking a patient's pulse by pressing on the wrist. She is able to feel a pulse because the vessel beneath her fingers has

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Question

A nurse in Kingston, Jamaica is taking a patient's pulse by pressing on the wrist. She is able to feel a pulse because the vessel beneath her fingers has

Accepted Answer

thick muscular walls that expand and recoil — Award 1 mark for recognising that arteries have thick elastic and muscular walls that stretch with each heartbeat, creating a pulse. A is incorrect — valves are characteristic of veins, not arteries. B is incorrect — thin walls describe capillaries. D is incorrect — wide lumen and slow flow describe veins.

Answer

a wide lumen with slow blood flow

Answer

valves that prevent backflow

Answer

thin walls that allow diffusion

Answer

thick muscular walls that expand and recoil

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