Measured as a Share of the Economy, the Size of the Trade

question 142

Multiple Choice

Measured as a share of the economy, the size of the trade sector (exports plus imports) of the United States has

• A) been increasing since 1980, but it declined during 1960-1980.
• B) been relatively constant during the last four decades.
• C) increased by about 10 percent during the last four decades.
• D) approximately doubled since 1980 and tripled since 1960.

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Definitions:

Kidney

An organ in vertebrates that filters waste products from the blood, regulates blood pressure, electrolyte balance, and red blood cell production.

Liver

Largest gland of the body, lying in the upper-right quadrant of the abdomen just inferior to the diaphragm; secretes bile and is of great importance in carbohydrate and protein metabolism and in detoxifying chemicals.

Hyperkalemia

Greater than normal concentration of potassium ions in the circulating blood.

Calcitonin

Hormone released from parafollicular cells that acts on tissues to cause a decrease in blood levels of calcium ions.