White Blood Cells (Leukocytes)

What is the normal range of white blood cells (WBC) in adults?

• 1,000–3,000 /µL

• 3,000–6,000 /µL

• 4,000–11,000 /µL

• 12,000–20,000 /µL

Which white blood cells are classified as granulocytes?

• Lymphocytes and monocytes

• Neutrophils, eosinophils, basophils

• Platelets and neutrophils

• Basophils and lymphocytes

Which white blood cells are agranulocytes?

• Neutrophils and eosinophils

• Lymphocytes and monocytes

• Basophils and neutrophils

• Eosinophils and basophils

What is the main function of neutrophils?

• To produce antibodies

• Phagocytosis of bacteria and debris

• To release histamine

• To kill parasites

Which WBC is mainly involved in allergic reactions and infections by parasites?

• Basophils

• Eosinophils

• Monocytes

• Lymphocytes

Which WBC releases histamine and heparin during inflammatory reactions?

• Neutrophils

• Basophils

• Lymphocytes

• Monocytes

Which white blood cell transforms into macrophages in the tissues?

• Neutrophils

• Monocytes

• Eosinophils

• Basophils

What is the function of lymphocytes?

• To destroy red blood cells

• To initiate coagulation

• To mediate immune responses (T-cells and B-cells)

• To release histamine

What is leukocytosis?

• Low WBC count

• Increase in WBC count above normal

• Absence of WBC

• Cancer of red blood cells

What is leukemia?

• Deficiency of platelets

• Cancer of white blood cells

• Excess of red blood cells

• Viral infection of lymphocytes