From the Esophagus to the Anal Canal, the Walls of Every

question 128

Multiple Choice

From the esophagus to the anal canal, the walls of every organ of the alimentary canal are made up of the same four basic layers. Arrange them in order from the lumen.

• A) muscularis externa, serosa, mucosa, and submucosa
• B) submucosa, serosa, muscularis externa, and mucosa
• C) mucosa, submucosa, muscularis externa, and serosa
• D) serosa, mucosa, submucosa, and muscularis externa

---

Definitions:

Long-run Equilibrium

A state in which all factors of production are fully adjustable, markets are perfectly competitive, and economic agents have no incentive to change their behavior.

Perfectly Competitive Market

A market structure characterized by many buyers and sellers, identical products, no barriers to entry or exit, and perfect information, leading to price takers.

Average Total Cost

The sum of all production expenses divided by the amount of goods produced.

Perfectly Competitive

A market structure where many firms offer products that are similar and entry into the market is relatively easy.