What Keeps the Trachea from Collapsing

question 60

Multiple Choice

What keeps the trachea from collapsing?

• A) Surface tension of water
• B) Surfactant
• C) Cilia
• D) Semicircular rings of cartilage

---

Definitions:

Dividend Yield

The annual dividends a firm distributes, expressed as a ratio of its current stock price.

Taxable Income

The portion of an individual's or corporation's income used as the basis for calculating tax owed to the government, after all allowable deductions or exemptions.

Preferred Stock

Preferred stock is a class of shares that typically provides a fixed dividend and has priority over common stock in the event of a liquidation, but generally does not carry voting rights.

Deductible

An amount that can be subtracted from an individual's or organization's taxable income, thereby reducing the amount of tax owed.