Immunological memory accounts for ________.
A) the human body's ability to distinguish self from nonself
B) the observation that some strains of the pathogen that causes dengue fever cause more severe disease than others
C) the ability of a helper T cell to signal B cells via cytokines
D) the ancient observation that someone who had recovered from the plague could safely care for those newly diseased
E) the ability of the immune system to present antigen fragments in association with major histocompatibility (MHC) antigens

Question

Quizplus · Accepted Answer

Immunological memory is the ability of the immune system to remember and recognize a pathogen it has encountered before, leading to a faster and more effective response upon subsequent exposure. This phenomenon explains why someone who has recovered from the plague can safely care for others who are newly infected, as their immune system has developed memory cells that recognize and respond to the pathogen.

Immunological Memory Accounts for ________