Dialysis Technician Practice Exam

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What is the chief iron-storage protein found in the body?

Hemoglobin
Myoglobin
Serum Ferritin
Transferrin

The correct answer is: Serum Ferritin

Serum ferritin is the chief iron-storage protein found in the body, serving as a critical component in the regulation and storage of iron. It binds iron in a soluble form and releases it when needed, ensuring that the body maintains sufficient iron levels for various physiological processes. This is particularly important since iron is an essential element necessary for the production of hemoglobin, myoglobin, and various enzymes. While hemoglobin and myoglobin are proteins that transport oxygen and are vital for oxygen delivery in the blood and muscle tissues, respectively, they do not function as storage proteins. Transferrin plays a crucial role in iron transport within the body, binding to iron and facilitating its delivery to cells and tissues but does not store iron itself. Therefore, serum ferritin uniquely serves the role of storing iron in the body, making it the correct answer.