Question

B cells and T cells are type of :

• A. Neutrophils
• B. Basophils
• C. Lymphocytes
• D. Antibodies

Hint:

Adaptive (specific) immunity is governed by Lymphocytes, which are divided into B cells (antibodies/humoral) and T cells (cell-mediated).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The vertebrate immune system relies on specialized white blood cells (leukocytes) to identify, target, and neutralize invading pathogens.
These cells are classified based on their origin, structure, and roles in innate or adaptive immunity.

Step 2: Detailed Explanation:
B cells (B lymphocytes) and T cells (T lymphocytes) are specialized sub-populations of Lymphocytes, which are a major class of mononuclear white blood cells.
1. B cells: Responsible for humoral immunity. They differentiate into plasma cells that synthesize and secrete highly specific antibodies to neutralize extracellular pathogens.
2. T cells: Responsible for cell-mediated immunity. They include helper T cells (which coordinate the immune response) and cytotoxic T cells (which directly kill infected or cancerous host cells).
Let us review the other choices:
- Neutrophils & Basophils: Granulocytic white blood cells involved primarily in innate, non-specific phagocytosis and inflammatory responses.
- Antibodies: Soluble proteins (immunoglobulins) produced by B cells, not cells themselves.

Step 4: Final Answer:
Therefore, B cells and T cells are types of Lymphocytes.