Which of the following is NOT one of the five types of leukocytes monitored as part of a CBC?

In the context of a complete blood count (CBC), leukocytes, or white blood cells, are crucial components that play a vital role in the body's immune response. The five primary types of leukocytes typically measured in a CBC include neutrophils, eosinophils, basophils, lymphocytes, and monocytes. Each type serves a specific function in the immune system, such as fighting infections, responding to allergens, and protecting against various pathogens.

Reticulocytes, on the other hand, are immature red blood cells and are specifically associated with red blood cell production rather than with the white blood cell count. While reticulocyte counts may be measured in a complete blood count to provide insights into a person's bone marrow function and red blood cell production, they are not classified as one of the leukocyte types.

This distinction is significant, as it highlights the specific role each type of blood cell plays in the body's physiology. Thus, identifying reticulocytes as not belonging to the leukocyte category is accurate, making it the correct choice in this scenario.