Which of the Following Statements About the Muscles of the Thorax

question 94

Multiple Choice

Which of the following statements about the muscles of the thorax is incorrect?

• A) When the diaphragm contracts, it decreases the volume of the thoracic cavity and expels air from the lungs.
• B) The muscles of the thorax assist in respiration.
• C) The internal and external intercostal muscles have opposite effects on the ribs.
• D) All of the above statements are correct.

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Definitions:

Long-Run Cost Diagram

A graphical representation that shows how the costs incurred by a firm change over time with varying levels of output when all inputs are variable.

Average Cost

The expense per unit, resulting from dividing the aggregate cost of production by the total units produced.

X-Inefficiency

X-Inefficiency occurs when a firm's output is not produced with the minimum possible resources due to factors like organizational slack, lack of competitive pressure, or managerial inefficiency.

Economies Of Scale

The cost advantages obtained due to the increased level of production, which causes the average cost per unit to fall.