One step in the functioning of a healthy immune system involves the T cells correctly interpreting that the antigen's protein is foreign. In an elderly adult, this response is affected by which age-related change?
A) The increased thickness and circulation to the skin.
B) An increase in the delayed cutaneous hypersensitivity response.
C) The thymus progressively declining in size.
D) A decrease in the number of immature T cells.
C
Feedback:
The decline in thymus size is an age-related change. This decline causes an increase in the number of immature T cells, which results in a reduced response to foreign antigens.
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