What term defines a substance that increases the immune response to an antigen?

What term defines a substance that increases the immune response to an antigen?

• A. Antigen
• B. Polyclonal Antibody
• C. Adjuvant
• D. Cytokine

Answer: (C)

An adjuvant is a substance that enhances the immune response to an antigen. It works by stimulating the innate immune system and activating antigen-presenting cells, which helps present the antigen more effectively to T and B cells. This leads to stronger and longer-lasting antibody and T-cell responses. In vaccines, adjuvants are added to boost immunogenicity when the antigen alone isn’t enough to provoke a robust reaction. An antigen is the substance that triggers the immune response. A polyclonal antibody is a mixture of antibodies against multiple epitopes of an antigen, not something that boosts the response itself. Cytokines are signaling proteins that regulate and modulate immune responses, rather than substances added to specifically increase the response to a given antigen.

An adjuvant is a substance that enhances the immune response to an antigen. It works by stimulating the innate immune system and activating antigen-presenting cells, which helps present the antigen more effectively to T and B cells. This leads to stronger and longer-lasting antibody and T-cell responses. In vaccines, adjuvants are added to boost immunogenicity when the antigen alone isn’t enough to provoke a robust reaction.

An antigen is the substance that triggers the immune response. A polyclonal antibody is a mixture of antibodies against multiple epitopes of an antigen, not something that boosts the response itself. Cytokines are signaling proteins that regulate and modulate immune responses, rather than substances added to specifically increase the response to a given antigen.