A nurse caring for adults in a physician’s office notes thatsome patients age more rapidly that other patients of thesame age. The nurse researches aging theories that attempt to describe how and why aging occurs. Which statements applyto the immunity theory of aging? Select all that apply.a. Chemical reactions in the body produce damage to the DNA.b. Free radicals have adverse effects on adjacent molecules.c. Decrease in size and function of the thymus causes infections.d. There is much interest in the role of vitamin supplementation.e. Lifespan depends on a great extent to genetic factors.f. Organisms wear out from increased metabolic functioning.

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A:

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