Question

When a virus invades the body, some B cells recognize it as nonself and produce plasma cells that release a substance to kill the virus. What is this substance called?

Answer 1

Plasma cells are designed to churn out Antibodies. These are proteins that have a variable region which is complementary ( perfect shape fit) for the virus' antigen and can therefore bind to the antigen, making the virus harmless or tagging it to be consumed by a phagocyte.

Answer 2

When a virus invades the body, some B cells recognize it as non-self and produce plasma cells that release a substance to kill the virus. These plasma cells are called antibodies. This substance is also called as immunoglobulins.