What Causes the Change in Pressure Needed for Normal Quiet

question 53

Multiple Choice

What causes the change in pressure needed for normal quiet expiration?

• A) Contraction of the diaphragm
• B) Contraction of the external intercostal muscles
• C) Elastic recoil of the lungs
• D) Dilation of the bronchial tree

---

Definitions:

Diseconomies of Scale

A situation where as a firm grows larger, the costs per unit increase, due to factors like coordination and operational inefficiencies.

Diminishing Returns

A principle stating that adding more of one factor of production, while holding others constant, will at some point yield lower incremental per-unit returns.

Short Run

A time period during which at least one input, such as plant size, is fixed and cannot be changed by the firm.

Average Total Cost Curve

A graphical representation showing the average total cost of producing various output levels, typically U-shaped due to economies and diseconomies of scale.