Which of the Following Statements Is True About the Effects

question 19

Multiple Choice

Which of the following statements is true about the effects of aging on the pulmonary system?
1) Alveolar septa gradually deteriorate.
2) The number of alveoli gradually decreases.
3) Loss of alveolar walls reduces the surface area for gas exchange.
4) Smooth muscle fibers in the lungs are progressively replaced with fibrous connective tissue.

• A)1, 2, 3
• B)2, 4
• C)1, 3
• D)1, 3, 4

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Definitions:

Marginal Product

is the increase in output resulting from a one-unit increase in the quantity of a particular input, while holding other inputs constant.

Competitive Market

A market structure characterized by a large number of sellers and buyers where no single entity has the power to influence market prices significantly.

Profits

The financial benefit that is realized when revenue generated from a business activity exceeds the expenses, costs, and taxes needed to sustain the activity.

Profit-maximizing

A strategy where a firm sets its production level and pricing to achieve the highest possible profit.