ANATOMY

Detailed explanation-1: -Because the adaptive immune system can learn and remember specific pathogens, it can provide long-lasting defense and protection against recurrent infections.

Detailed explanation-2: -Immunologic memory is another important characteristic of adaptive immunity. It means that the immune system can remember the antigens that previously activated it and launch a more intense immune reaction when encountering the same antigen a second time (Figure 2.10).

Detailed explanation-3: -A type of immunity that develops when a person’s immune system responds to a foreign substance or microorganism, such as after an infection or vaccination.

Detailed explanation-4: -Memory is a characteristic recognized within both the innate and adaptive arms of the immune system. Although the mechanisms and properties through which innate and adaptive immune memory are induced are distinct, they collude to improve host defense to pathogens.

Detailed explanation-5: -The adaptive immune response in B cells, Helper T cells and Cytotoxic T cells involved four phases: encounter, activation, attack, and memory.