INBDE (Integrated National Board Dental Examination) Practice Exam

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Are smooth muscle fibers striated?

  1. Yes

  2. No

  3. Only in certain areas

  4. Depends on the muscle location

The correct answer is: No

Smooth muscle fibers are not striated. Unlike skeletal muscle, which is striated due to the arrangement of myofilaments in a structured pattern, smooth muscle lacks the organized pattern of sarcomeres that result in striations. Smooth muscle is found in various locations in the body such as blood vessels, the gastrointestinal tract, and the respiratory tract, and its lack of striations allows for more controlled, involuntary movements.

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