Why does passive immunity not give lifetime protection, while active immunity may?
A) In active immunity, the body's own lymphocytes respond, producing a memory cell population that can respond to a subsequent exposure to the same antigen. Passive immunity only lasts as long as the injected antibodies remain in the body.
B) In passive immunity, the body's own lymphocytes respond, producing a memory cell population that can respond to a subsequent exposure to the same antigen. Active immunity only lasts as long as the injected antibodies remain in the body.
C) In active immunity, the body's own lymphocytes respond, producing an effector cell population that continually produces antibodies for the duration of the person's lifetime. Passive immunity only lasts as long as the injected antibodies remain in the body.
D) In active immunity, the body's own lymphocytes respond, producing an effector cell population that continually produces antibodies for the duration of the person's lifetime. Passive immunity results in the production of antibodies only when an antigen is present.
E) This question is misleading. Both passive immunity and active immunity provide lifetime protection.

Question

Quizplus · Accepted Answer

In active immunity, the body produces memory cells that can respond to subsequent exposure to the same antigen, providing long-lasting protection. In passive immunity, the antibodies are already formed and injected, providing immediate but temporary protection as they are not produced by the body's own lymphocytes and do not stimulate the formation of memory cells.

Why Does Passive Immunity Not Give Lifetime Protection, While Active