At 2 or 3 Weeks of Age,an Infant Who Has

question 20

Multiple Choice

At 2 or 3 weeks of age,an infant who has been well fed and has gained weight begins to vomit for no apparent reason.The vomiting gradually becomes more forceful.These symptoms may be indicative of which disorder?

• A) Esophageal atresia
• B) Congenital aganglionic megacolon
• C) Pyloric stenosis
• D) Galactosemia

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Definitions:

Short-Run Equilibrium

A state in a market where supply equals demand, but only considering a period in which some factors, like production capacity, remain constant.

Constant-Cost Industry

An industry in which the entry and exit of firms have no effect on the prices firms in the industry must pay for resources and thus no effect on production costs.

Long-Run Economic Profits

Profits earned by a firm when all resources are adjusted to their long-term optimal level, indicating the firm is in equilibrium and cannot earn higher profits by altering production.

Free Entry And Exit

A situation in a market where firms can enter and leave the industry without facing significant barriers or costs, promoting competition.