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) enlargement of the thymus and increased levels of circulating thymic hormones.

Question

Quizplus · Accepted Answer

As individuals age, the immune system becomes less responsive, and this is due to various factors, including decreased production of naive T cells and reduced functionality of existing T cells. This leads to a decreased ability to respond to new antigens and increased susceptibility to infections.

Changes in the Immune System That Accompany Aging Include