PATHOLOGY

Detailed explanation-1: -The primary immune response to antigen occurs on the first occasion it is encountered. This response can take up to 14 days to resolve and leads to the generation of memory cells with a high specificity for the inducing antigen.

Detailed explanation-2: -The primary immune response occurs when an antigen is recognized for the very first time. The lag phase for the primary immune response is long because the immune system doesn’t immediately recognize the antigen.

Detailed explanation-3: -Innate immunity responds to infection immediately, and it responds in the same way each time a new pathogen is encountered. It is not antigen specific. The innate immune response does not lead to the creation of antibodies or memory cells that provide protection against future infections by the same pathogen.

Detailed explanation-4: -The adaptive immune response is a slower-acting, longer-lasting, and more specific response than the innate response. However, the adaptive response requires information from the innate immune system to function.