INBDE (Integrated National Board Dental Examination) Practice Exam

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Where is calmodulin found?

  1. Cardiac muscle

  2. Smooth muscle

  3. Skeletal muscle

  4. Nerve tissue

The correct answer is: Smooth muscle

Calmodulin is a protein that is involved in regulating various cellular functions by binding to calcium. One of the primary functions of calmodulin is its role in regulating the contraction of smooth muscle. Smooth muscle is found in the walls of hollow organs, blood vessels, and other internal structures, where it plays a role in processes like peristalsis and regulating blood flow. Therefore, calmodulin is predominantly found in smooth muscle tissue, making choice B the correct answer. While calmodulin plays a role in the function of other tissues like cardiac muscle, skeletal muscle, and nerve tissue, its primary function and presence are most closely associated with smooth muscle tissue.

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