Which of These Actions Brings on Normal Expirations

question 44

Multiple Choice

Which of these actions brings on normal expirations

• A)contraction of the external intercostals
• B)contraction of the internal intercostals
• C)contraction of the diaphragm
• D)elastic recoil of stretched lung tissues and relaxation of inspiratory muscles

---

Definitions:

Market Share

The portion of total industry revenue attributed to a specific company over a predetermined time frame.

Concentration Ratio

A measure of the market share controlled by the largest firms within an industry, used to indicate the degree of market competition.

Market Share

The percentage of an industry's sales that a particular company controls.

Herfindahl-Hirschman Index

A measure of market concentration used to determine the level of competition within an industry, calculated by summing the squares of the market shares of all firms in the market.