American Academy of Professional Coders (AAPC) Practice Exam

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What does the prefix "Dia-" signify?

Before; forward
Through; complete
After; behind
Away from

The correct answer is: Through; complete

The prefix "Dia-" signifies the concept of "through" or "complete." It is often used in medical terminology to indicate action that occurs across a certain space or process, as well as a sense of thoroughness or entirety in regards to the subject matter. For example, in the term "diabetes," it refers to conditions that involve excessive urination and sugar excretion, signifying the thorough passage through the renal system. Understanding this prefix can aid in comprehending various medical terms that describe conditions, procedures, or processes that involve movement or transition completely through a specified area or function. The other options reflect different prefixes that convey entirely separate meanings; "before" or "forward," "after" or "behind," and "away from" indicate distinct concepts that do not relate to the definition of "Dia-." Understanding the significance of "Dia-" helps in decoding the intended meaning of numerous medical and scientific terms.