Certification Board for Sterile Processing and Distribution (CBSPD) Sterile Processing Technician Practice Exam

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What type of specialized cells are responsible for contractions throughout the body?

  1. Myoepithelial cells

  2. Fibroblasts

  3. Muscles

  4. Nerve cells

The correct answer is: Muscles

Muscle cells are the specialized cells responsible for contractions throughout the body. They are categorized into three main types: skeletal, cardiac, and smooth muscle. Skeletal muscle cells are under voluntary control and enable movement of bones, cardiac muscle cells are involuntary and make up the heart, facilitating blood pumping, and smooth muscle cells control involuntary movements in organs such as the stomach and intestines. Myoepithelial cells are found between the basal lamina and the epithelial cells of certain glands, helping to facilitate the secretion of substances but they do not contract in the same manner as muscle cells. Fibroblasts are connective tissue cells that produce collagen and other fibers, playing a critical role in tissue repair and integrity but are not involved in contraction. Nerve cells, or neurons, are responsible for transmitting signals throughout the body, controlling muscle contractions indirectly, rather than performing contractions themselves. Therefore, muscle cells are distinctly appropriate for the role of executing contractions in various organs and tissues.