All of the following are functions of immunoglobulins except:

All of the following are functions of immunoglobulins except:

• A. Neutralizing toxic substances
• B. Facilitating phagocytosis through opsonization
• C. Interacting with TC cells to lyse viruses
• D. Combining with complement to destroy cellular antigens

Answer: (C)

Immunoglobulins, also known as antibodies, perform various essential functions in the immune system. They are primarily involved in recognizing and binding to specific antigens, which facilitates a range of immune responses. The function covered by the correct answer pertains to the role of T cytotoxic (TC) cells in immune response. While immunoglobulins play critical roles in neutralizing toxins, opsonization to facilitate phagocytosis, and complement activation for destroying cellular antigens, they do not directly interact with TC cells to induce lysis of viruses. Instead, TC cells recognize virus-infected cells through their T cell receptors and carry out the lysis independently of antibodies. This distinction highlights that antibodies primarily act in the humoral response, while TC cells function in the cell-mediated response. The roles of immunoglobulins in neutralizing toxins, opsonization, and complement activation all reflect their contributions to the body's defense mechanisms against pathogens and harmful substances, underscoring their importance in the immune response.

Immunoglobulins, also known as antibodies, perform various essential functions in the immune system. They are primarily involved in recognizing and binding to specific antigens, which facilitates a range of immune responses.

The function covered by the correct answer pertains to the role of T cytotoxic (TC) cells in immune response. While immunoglobulins play critical roles in neutralizing toxins, opsonization to facilitate phagocytosis, and complement activation for destroying cellular antigens, they do not directly interact with TC cells to induce lysis of viruses. Instead, TC cells recognize virus-infected cells through their T cell receptors and carry out the lysis independently of antibodies. This distinction highlights that antibodies primarily act in the humoral response, while TC cells function in the cell-mediated response.

The roles of immunoglobulins in neutralizing toxins, opsonization, and complement activation all reflect their contributions to the body's defense mechanisms against pathogens and harmful substances, underscoring their importance in the immune response.