Certified Registered Nurse Infusion (CRNI) Practice Exam

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Which trace element is most abundant and facilitates wound healing?

  1. Iron

  2. Zinc

  3. Magnesium

  4. Calcium

The correct answer is: Zinc

Zinc is a trace element that plays a crucial role in wound healing due to its involvement in numerous biological processes. It is essential for cell division, protein synthesis, and the functioning of various enzymes, many of which are important in the wound healing process. Zinc contributes to the maintenance of skin integrity and structure, supports the inflammatory response necessary for healing, and has antioxidant properties that protect cells from oxidative stress. Additionally, its role in synthesizing collagen and promoting epithelial cell proliferation further establishes zinc as a fundamental component for effective wound healing. While iron, magnesium, and calcium also have important physiological roles, they do not directly facilitate wound healing to the same extent as zinc. Iron is critical for oxygen transport and energy metabolism, magnesium is involved in numerous enzymatic reactions and muscle function, and calcium is vital for blood clotting and bone health. However, these elements do not specifically promote the complex processes involved in wound healing in the same way that zinc does. This makes zinc the most relevant trace element in this context.