Veterinary Technician National Exam (VTNE) Practice Exam

Which two white blood cells are phagocytic (eat foreign cells and material by engulfing them)?

1. A - B-Lymphocyte, Eosinophil

2. B - Monocyte, Neutrophil

3. C - Basophil, Lymphocyte

4. D - Neutrophil, Thrombocyte

The correct answer is: B - Monocyte, Neutrophil

The correct answer identifies monocytes and neutrophils as the two types of white blood cells that are phagocytic. Phagocytosis is a critical function in the immune response, allowing these cells to engulf and digest pathogens, dead cells, and other debris that could harm the body. Monocytes are a type of white blood cell that can differentiate into macrophages and dendritic cells once they migrate into tissues. Macrophages play a significant role in engulfing pathogens and presenting antigens to other immune cells, which is vital for initiating a broader immune response. Neutrophils are the most abundant type of white blood cells and are often the first responders to sites of infection. They are highly efficient at phagocytosis and can quickly eliminate bacteria and fungi through this mechanism. Neutrophils also release enzymes and antimicrobial substances to help control infections. The other options include cell types that do not primarily function through phagocytosis. B-lymphocytes are responsible for producing antibodies, basophils are involved in allergic responses and inflammation, and thrombocytes (platelets) are primarily involved in blood clotting rather than immune responses.