Essay
As we age,our thymus shrinks,or atrophies,by a process called involution,yet T-cell immunity is still functional in old age.
A.Explain how T-cell numbers in the periphery remain constant in the absence of continual replenishment from the thymus.
B.How does this differ from the maintenance of the B-cell repertoire?
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A.After thymic atrophy or thymectomy,T c...View Answer
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