Changes in the immune system that accompany aging include
A) T cells becoming less responsive to antigens.
B) more cytotoxic T cells responding to infections.
C) increased numbers of T helper cells.
D) higher levels of antibodies after initial exposure to antigens.
E) all of the above

Question

Quizplus · Accepted Answer

As we age, our T cells (which play a central role in immune response) become less responsive to antigens. This can result in a decreased ability to fight off infections and increased susceptibility to disease. While other changes may occur, such as an increase in cytotoxic T cells or T helper cells, the decreased responsiveness of T cells is the most significant and consistent change that occurs in the immune system during aging. Higher levels of antibodies after initial exposure to antigens is not a change that happens with age, as this is a normal immune response regardless of age.

Changes in the Immune System That Accompany Aging Include