Which statement about innate and adaptive responses is true?

Which statement about innate and adaptive responses is true?

• A. The innate response is non-specific.
• B. The adaptive response is non-specific.
• C. The innate response has immunological memory.
• D. The adaptive response is associated with immunological memory.

Answer: (D)

Immunological memory is a hallmark of the adaptive immune response. After first exposure to an antigen, specific B and T cells become activated and form long-lived memory cells. When the same antigen appears again, these memory cells respond quickly and more robustly, producing a faster, stronger, and more targeted attack (the secondary response). This memory is the reason vaccines work, teaching the immune system to respond effectively without causing disease. The innate response, by contrast, is non-specific and provides immediate defense but does not generate lasting memory to improve future responses. That distinction is what makes the statement about the adaptive response being associated with immunological memory true.

Immunological memory is a hallmark of the adaptive immune response. After first exposure to an antigen, specific B and T cells become activated and form long-lived memory cells. When the same antigen appears again, these memory cells respond quickly and more robustly, producing a faster, stronger, and more targeted attack (the secondary response). This memory is the reason vaccines work, teaching the immune system to respond effectively without causing disease. The innate response, by contrast, is non-specific and provides immediate defense but does not generate lasting memory to improve future responses. That distinction is what makes the statement about the adaptive response being associated with immunological memory true.