What Purpose Does Mucus in the Nasal Cavity Serve

question 13

Multiple Choice

What purpose does mucus in the nasal cavity serve?

• A) Collect inhaled dust
• B) Remove pathogens from inspired air
• C) Warm inspired air
• D) There is no purpose; mucus in the nasal cavity is a sign of infection

---

Definitions:

Product Demand

The quantity of a product or service that consumers are willing and able to purchase at various prices during a specified time period.

Contribution Margin

The residual sum from sales income once variable expenses are subtracted, showing the extent to which it helps cover fixed expenses and create profit.

Variable Costs

Expenses that change in proportion to the activity of a business, such as utility costs that increase with higher production levels.

Fixed Costs

Costs that remain constant regardless of how much is produced or sold, including expenses like rent, salaries, and insurance.