Which Statement Correctly Describes What Happens During Inspiration

question 4

Multiple Choice

Which statement correctly describes what happens during inspiration?

• A) The external intercostal, pectoralis minor, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.
• B) The external intercostal, pectoralis major, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.
• C) The external intercostal, pectoralis major, and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm relaxes to flatten its dome shape.
• D) The external intercostal and sternocleidomastoid muscles contract to expand the rib cage and the diaphragm contracts to flatten its dome shape.

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Definitions:

Monopolistic Competition

A market structure characterized by many firms selling products that are similar but not identical, allowing for significant degrees of market power and product differentiation.

Oligopoly

A market structure characterized by a small number of firms which dominate the market, leading to limited competition and often high prices.

Four-firm Concentration Ratio

A measure that expresses the total market share held by the four largest firms within an industry.

Herfindahl Index

A calculation of how concentrated a market is, achieved by adding together the market share squares of every firm within that industry.