Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam 2025 - Free Medical Laboratory Science Practice Questions and Study Guide

Question: 1 / 400

Which of the following is not a leukocyte?

Basophil

Platelet

The answer identifying platelet as the option that is not a leukocyte is accurate because platelets, or thrombocytes, are cell fragments responsible primarily for blood clotting and wound healing. They are not classified as leukocytes, which are the white blood cells of the immune system.

Leukocytes play a critical role in the body's defense against infection and disease, with various types having specialized functions. Basophils, for instance, are involved in inflammatory reactions and the release of histamine during allergic responses. Monocytes are essential for phagocytosing pathogens and presenting antigens, and neutrophils are key players in the initial response to infection, engaging in the rapid elimination of bacteria and fungi.

Understanding the roles and classifications of blood cells helps in comprehending their functions in the immune system and overall health.

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Monocyte

Neutrophil

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