Which type of immunity provides the first barrior of protection against invading antigens?Multiple choice question.innatespecificacquired

Analysis of the Question

The question asks about the type of immunity that serves as the first barrier of protection against invading antigens. To determine this, we will analyze the options given: innate immunity, specific immunity, and acquired immunity.

Relevant Concepts

1. Innate Immunity: This is the body's first line of defense against pathogens and includes physical barriers (such as skin and mucous membranes) and internal defenses (like phagocytic cells).
2. Specific Immunity: This refers to the adaptive immune response that is tailored to specific pathogens, involving lymphocytes (B and T cells) that recognize and remember specific antigens.
3. Acquired Immunity: Often used interchangeably with specific immunity, it refers to immunity gained after exposure to a disease or through vaccination, building memory cells for future responses.

Answer

1. Innate Immunity is the correct answer as it serves as the first barrier of protection against invading antigens. It includes immediate, nonspecific responses to pathogens that do not require prior exposure.

Final Answer

Innate immunity provides the first barrier of protection against invading antigens.