Maria Has Been Asked to Be a Subject in a Study

question 57

Multiple Choice

Maria has been asked to be a subject in a study to determine if additional vitamin A will promote the growth of healthy, strong fingernails. Since she wants the study to be as close to the “ideal” nutrition intervention study as possible, she will want to be sure that:

• A)only the researcher knows which participants receive vitamin A.
• B)all of the participants are between 18 and 25 years of age.
• C)her chances of getting vitamin A are better than those of anyone else.
• D)half of the participants get something that looks like additional vitamin A but isn't.

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Definitions:

Secondary Aging

Aging processes that result from disease and bodily abuse and disuse and are often preventable.

Tertiary Aging

Refers to the decline in physical and cognitive function that can occur in some individuals in very old age, beyond the normal effects of primary and secondary aging.

Programmed Aging

A theory suggesting aging is a result of genetically programmed physiological mechanisms that control life span and deterioration processes.

Primary Aging

Gradual, inevitable process of bodily deterioration throughout the life span.