When exposure to a pathogen identical to one that has been encountered previously occurs and the immune system responds, the response of the immune system is based upon
A)suppression
B)regression
C)lactation
D)migration
E)memory

Question

Quizplus · Accepted Answer

When exposure to the same identical pathogen occurs again, the immune system recognizes the pathogen and has its responses ready to act quickly based on memory.

When Exposure to a Pathogen Identical to One That Has