INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

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!

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In what direction do wrinkles form in relation to muscle pull?

Parallel
Perpendicular
Random
Diagonal

The correct answer is: Perpendicular

Wrinkles form perpendicular to muscle pull because of the way the muscle fibers orient themselves. When the muscle contracts, the fibers pull together, which causes a perpendicular wrinkling effect on the skin. This is why options A, C, and D are incorrect. Wrinkles formed in parallel with muscle pull would require the muscle fibers to be aligned in a way that does not occur naturally. Random wrinkles suggest no correlation with muscle pull at all. Diagonal wrinkles may occur, but not consistently, making option D incorrect.