AP BIOLOGY

THE HUMAN IMMUNE SYSTEM

IMMUNE RESPONSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What will happen to antibody production during the second exposure to the same antigen
A
antibody production is slower and less are made
B
antibody production is quicker and more are made
C
antibody production is quicker and less are made
D
antibody production is slower and more are made
Explanation: 

Detailed explanation-1: -If the body is exposed to the same pathogen more than once, the antibody response is much faster and more effective than the first time around because the memory cells are at the ready to pump out antibodies against that antigen.

Detailed explanation-2: -If antigen appears in the organism a second time, then the memory cells are already present at high levels, and produce a more rapid and much stronger immune response.

Detailed explanation-3: -If we are ever reinfected with that same type of pathogen, our body will respond with a secondary immune response. This is a much quicker and more efficient response because our body now contains the memory cells with the antibodies that are specific to that reinvading antigen.

Detailed explanation-4: -Upon re-exposure to the same pathogen, memory cells differentiate into antibody-secreting plasma cells that output a greater amount of antibody for a longer period of time.

Detailed explanation-5: -Because our memory cells are “experienced, ” we will respond to a second (or subsequent) encounter more quickly. Whereas in a primary encounter, antibodies are not generated for several days, during a memory response antibodies appear in just a few days.

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