The Upper Esophageal Sphincter Is Composed of a Circular Band

question 67

Multiple Choice

The upper esophageal sphincter is composed of a circular band of skeletal muscle. The lower esophageal sphincter is composed of a circular band of smooth muscle.

• A) Both statements are true.
• B) Both statements are false.
• C) The first statement is true; the second is false.
• D) The second statement is true; the first is false.

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Definitions:

Voluntary Exchange

A transaction where two parties freely agree to trade goods, services, or resources for mutual benefit.

Circumstances

The existing conditions or state of affairs surrounding and affecting an agent or event.

Trade

The exchange of goods and services between individuals or entities, often across borders, which can improve efficiency and contribute to economic growth.