INBDE (Integrated National Board Dental Examination) Practice Exam

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Are C fibers myelinated?

Yes
No
Partially
Not Specified

The correct answer is: No

C fibers are a type of nerve fiber found in the peripheral and autonomic nervous systems that transmit sensory information. Unlike A fibers, which are heavily myelinated, C fibers are unmyelinated or only partially myelinated. This lack of myelination allows for slower transmission of signals compared to A fibers. Therefore, the correct answer is B, "No," as C fibers are not myelinated. Option A, "Yes," is incorrect as previously explained, and option D, "Not Specified," is also incorrect as it does not provide any information about myelination. Option C, "Partially," is a distractor and may be tempting to choose as a correct answer, but it is not fully accurate as C fibers are not fully myelinated.