American Academy of Professional Coders (AAPC) Practice Exam

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Which prefix is used for indicating something is near or towards something?

Ad-
Ab-
Trans-
Post-

The correct answer is: Ad-

The prefix "ad-" is used to indicate proximity or direction towards something. In medical terminology and other scientific contexts, "ad-" typically connotes movement towards or addition to, highlighting a relationship in terms of location or function. For example, the term "adduction" in anatomy refers to the movement of a limb towards the body's midline. The other prefixes serve different functions: "ab-" generally indicates a movement away from something, "trans-" denotes crossing or moving through, and "post-" signifies a relation to something that occurs after or behind. Thus, "ad-" accurately reflects the concept of nearness or direction towards, making it the correct choice.