In the introduction to adaptive (acquired) immunity, which two types of blood cells are chiefly responsible for acquired immunity?

• A. Neutrophils and eosinophils
• B. B lymphocytes and T lymphocytes
• C. Erythrocytes and platelets
• D. Monocytes and basophils

Answer: (B)

Verified step by step guidance

1. Understand that adaptive (acquired) immunity is a specific immune response that develops after exposure to a particular antigen, providing long-lasting protection.
2. Recall that the main cells involved in adaptive immunity are lymphocytes, which are a type of white blood cell specialized in recognizing specific pathogens.
3. Identify the two primary types of lymphocytes responsible for adaptive immunity: B lymphocytes (B cells) and T lymphocytes (T cells).
4. Recognize that B lymphocytes are responsible for producing antibodies that target specific antigens, while T lymphocytes help in directly killing infected cells or assisting other immune cells.
5. Conclude that among the options given, B lymphocytes and T lymphocytes are the correct cells chiefly responsible for acquired immunity.