Question

which type of b cells secrete antibodies and are activated when an atigen interacts with a b cell?
helper cells
memory cells
plasma cells

Explanation:

• Helper cells: These are T - cells (not B - cells) that assist in activating other immune cells, so they don't secrete antibodies as B - cells.
• Memory cells: Memory B - cells are formed after an immune response and are responsible for a faster response in future infections, but they do not secrete antibodies immediately upon antigen interaction.
• Plasma cells: When a B - cell is activated by an antigen, it differentiates into a plasma cell, and plasma cells are responsible for secreting antibodies.

Answer:

C. plasma cells