A Stab Wound to the Chest Causes the Lung to Collapse

question 14

Multiple Choice

A stab wound to the chest causes the lung to collapse because

• A)of a sudden increase in surface tension.
• B)intrapulmonic pressure becomes less than atmospheric pressure.
• C)intrapulmonic pressure becomes higher than intrapleural pressure.
• D)intrapleural pressure becomes greater than intrapulmonic pressure.

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Definitions:

Purely Competitive

A purely competitive market is one with many sellers and buyers where no single entity has significant control over prices and where products are largely undifferentiated, leading to market equilibrium determined by supply and demand.

Total Profit

The total financial gain made by a business after subtracting all costs and expenses from total revenue.

Short Run

A time period in economics during which at least one input is fixed and cannot be changed by the firm, contrasting with the long run where all inputs are variable.

Average Variable Cost

The total variable cost divided by the quantity of output produced; it is the cost of producing an additional unit of a good or service.