Phlebotomy Technician Practice Exam (NCPT/CPT)

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Prepare effectively for the NCPT/CPT Phlebotomy Technician Exam. Utilize flashcards and multiple-choice questions with hints and explanations to excel in your exam.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Lumen is defined as

The outer layer of an artery
Space within the walls of an artery, vein, or tube
A blockage in a blood vessel
The innermost lining of the heart

The correct answer is: Space within the walls of an artery, vein, or tube

The correct explanation for this question is that lumen refers to the space within the walls of an artery, vein, or tube. This means that options A, C, and D are incorrect because they refer to different anatomical structures that are not the same as lumen. Option B is the only choice that accurately describes lumen and its location within the body. A lumen is the hollow part of a tubular structure, such as blood vessels or the digestive tract, through which substances flow. So, option B is the correct choice because it accurately defines lumen.