The base of the Y binds to B cells. Antibodies recognize specific antigens. Antibodies are produced by B cells. They are concentrated in lymph nodes and other organs. They have cell surface receptors to detect antigens.
Antibodies stick out from cell surface.
Functioning in recognizing between self and no-self. The immune system in action . Scenario - let's imagine that the hepatitis A virus has breached our first wall of defense and is intent on attacking our liver. Macrophages engulf virus. However, some virus makes it to the liver and infects the liver cells.