What Happens to the Amount of Smooth Muscle Found in the Walls

question 38

Multiple Choice

What happens to the amount of smooth muscle found in the walls of the respiratory tract as it moves down from the upper conducting zone to the lower respiratory zone?

• A)increases
• B)decreases
• C)thins
• D)It is not found in the conducting zone.
• E)no change

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Definitions:

Gross Profit

The difference between sales revenue and the cost of goods sold, before deducting overheads, taxes, and interest payments.

Operating Expenses

Costs related to the day-to-day functions of a business outside of direct production costs, such as rent, salaries, and utilities.

Direct Materials

Raw materials that are directly traceable to the manufacturing of a product and considered variable costs.

Cost of Goods Sold

The direct costs attributable to the production of the goods sold by a company, including the cost of the materials and labor used in creating the product.