B lymphocytes

Definition

B lymphocytes, also known as B cells, are a type of white blood cell crucial for the adaptive immune response. They produce antibodies to neutralize pathogens and remember past infections for faster responses in the future.

5 Must Know Facts For Your Next Test

1. B cells mature in the bone marrow before entering circulation.
2. Each B cell has a unique receptor that binds to specific antigens.
3. Upon activation by an antigen, B cells differentiate into plasma cells and memory B cells.
4. Plasma cells are responsible for producing large quantities of antibodies.
5. Memory B cells provide long-term immunity by remembering previous encounters with pathogens.

Review Questions

• Where do B lymphocytes mature?
• What happens to a B cell after it binds to its specific antigen?
• What is the primary function of plasma cells derived from B lymphocytes?

Related terms

Antigen:

A substance that triggers an immune response by binding to receptors on lymphocytes.

T Lymphocyte: A type of white blood cell that plays a central role in cell-mediated immunity.

Antibody:

A protein produced by plasma cells that binds specifically to an antigen.