Why Do Cigarette Smokers Cough More Than Most People Do

question 12

Multiple Choice

Why do cigarette smokers cough more than most people do?

• A)The tar in cigarette smoke tends to make alveoli stick closed.Coughing opens them.
• B)Coughing is the respiratory system's attempt to clear itself of the thick mucus that is produced in response to smoke exposure.
• C)Cigarette smoking partially paralyzes the lungs; coughing exchanges the resultant "dead air."
• D)Coughing stimulates blood flow to the lungs.

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Definitions:

Total Output

The total quantity of goods and services produced in an economy during a given period.

Fixed Cost

Expenses that do not change in total regardless of the level of output or activity, such as rent, salaries, and insurance.

Variable Cost

Expenses that vary directly with the volume of output or business operations.

Marginal Cost

The financial outlay required to produce an additional unit of a product or service.