Read the following statements :

Statement I: B-cells are responsible for antibody-mediated immune response.

Statement II: The primary function of B-cells is to secrete antibodies into the body fluids.

Both statement I and statement II are correct .

Both statement I and statement II are correct .

Statement I: Antibody-mediated immune response is provided by B-cells.

Explanation: B-cells, also known as B lymphocytes, play a crucial role in the immune response by producing antibodies. When an antigen (foreign substance) enters the body, B-cells recognize it and undergo activation. Upon activation, B-cells differentiate into plasma cells, which are specialized cells that produce and secrete antibodies. These antibodies bind to the antigens, marking them for destruction by other immune cells or neutralizing their effects. This process is known as antibody-mediated immune response, and it is a key defense mechanism against pathogens and foreign invaders.

Statement II: B-cells work chiefly by secreting substances called antibodies into the body fluids.

Explanation: B-cells primarily function by secreting antibodies into the body fluids. Antibodies, also called immunoglobulins, are protein molecules that are produced by B-cells in response to the presence of specific antigens. These antibodies are released into the blood and other body fluids, such as saliva, mucus, and tears. Once in the body fluids, antibodies can bind to antigens, preventing them from infecting cells or neutralizing their harmful effects. By secreting antibodies, B-cells contribute to the body's defense against infections and diseases.

In summary, B-cells are responsible for antibody-mediated immune response, and they primarily function by secreting antibodies into the body fluids to combat antigens and protect the body from pathogens.