Which sub-component is associated with white blood cells?

Neutrophils, identified by the abbreviation NEU, are a subtype of white blood cells crucial for the immune response. They play a significant role in defending the body against infections, particularly bacterial infections. Neutrophils are typically the first responders to sites of inflammation or injury and are vital in phagocytizing pathogens and debris, thereby facilitating healing.

The other options do not specifically relate to white blood cells. Mean Platelet Volume (MPV) measures the size of platelets and indirectly indicates platelet production in bone marrow. Platelet Distribution Width (PDW) assesses the variability in the size of platelets in a sample, providing information on platelet activation or production. Hematocrit (HCT) measures the proportion of blood volume that is occupied by red blood cells and does not pertain to white blood cells or their functions. The specific association of neutrophils with white blood cells highlights their essential role in immune defense mechanisms.