The Best Conclusion to Draw from Biological Theories of Aging

question 28

Multiple Choice

The best conclusion to draw from biological theories of aging is

• A) programmed cell death accounts for general aging.
• B) free radicals explain metabolic changes in aging.
• C) metabolic theories account for all of the changes in aging.
• D) none of these theories completely explain normative aging.

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Definitions:

Purchasing-Power Parity

An economic theory that compares different countries' currencies through a "basket of goods" approach, suggesting that exchange rates should adjust to equalize the cost of this basket between countries.

Real Exchange Rate

The speed at which an individual is able to convert the money of one nation into that of another, taking inflation into account.

Nominal Exchange Rate

The speed at which the currency of one nation can be traded for the currency of another nation, without correction for inflation.

Trade Balance

Trade balance is the difference between the value of a country's exports and imports over a certain period, indicating the relative strength of its international trade.