Microbiology Practice Exam

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What is another name for leukocytes?

Stem cells
Platelets
White blood cells
Red blood cells

The correct answer is: White blood cells

Leukocytes are commonly known as white blood cells. This nomenclature reflects their primary role in the immune system, where they serve to protect the body against both infectious disease and foreign invaders. The term "leukocyte" derives from Greek roots, with "leuko-" meaning white, and "-cyte" meaning cell, emphasizing their coloration in contrast to red blood cells. The other terms provided refer to different components of blood. Stem cells are undifferentiated cells that have the potential to develop into various cell types, including leukocytes, but they are not leukocytes themselves. Platelets are cell fragments involved in the clotting process and play no direct role in the immune response. Red blood cells are responsible for transporting oxygen and carbon dioxide in the bloodstream and are distinct from white blood cells, both in function and appearance. Thus, the term white blood cells captures the essence of leukocytes' function within the immune system.