Why Does the Upper Third of the Esophagus Have Skeletal

question 144

Multiple Choice

Why does the upper third of the esophagus have skeletal muscle in its wall?

• A)so you do not choke
• B)the first phase of swallowing is voluntary
• C)so that peristalsis can occur
• D)the first phase of swallowing is involuntary

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Definitions:

Nomadic Herders

People who move from one place to another with their livestock, searching for pasture and water, in a cyclical pattern.

Barrel Model

A conceptual model used in anthropology to understand societies by analyzing their economic, social, and ideological systems as interconnected layers.

Infrastructure

The fundamental physical and organizational structures needed for the operation of a society or enterprise, such as roads, bridges, and water supply.

Superstructure

In Marxist theory, the cultural, legal, political, and ideological systems and institutions that derive from and support the economic base of a society.