Esophagus Anatomy Overview

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Questions and Answers

Which sphincter in the esophagus is under voluntary control?

  • Upper esophageal sphincter (UES) (correct)
  • Lower esophageal sphincter (LES)
  • It is not specified in the text
  • Both UES and LES

What is the main function of the lower esophageal sphincter (LES)?

  • Preventing food from entering the windpipe
  • Allowing acid reflux into the esophagus
  • Preventing acid and stomach contents from moving back into the esophagus (correct)
  • Controlling breathing and belching

What is the role of the upper esophageal sphincter (UES) in relation to the windpipe?

  • It ensures easy passage of food into the windpipe
  • It prevents food and secretions from entering the windpipe (correct)
  • It controls the airflow in and out of the windpipe
  • It helps in digesting food before reaching the windpipe

What is the primary function of the lower esophageal sphincter (LES) in the digestive system?

<p>Preventing acid and stomach contents from traveling back up the esophagus (D)</p> Signup and view all the answers

Which statement accurately describes the location of the esophagus in relation to the windpipe (trachea)?

<p>The esophagus runs behind the trachea (C)</p> Signup and view all the answers

Which sphincter in the esophagus is under voluntary control and involved in breathing?

<p>Upper esophageal sphincter (UES) (D)</p> Signup and view all the answers

What is the function of the upper esophageal sphincter (UES) in relation to preventing aspiration?

<p>It closes to prevent food and secretions from entering the windpipe (D)</p> Signup and view all the answers

How does the lower esophageal sphincter (LES) contribute to protecting the stomach?

<p>By preventing harmful substances from entering the stomach (B)</p> Signup and view all the answers

Flashcards

Upper Esophageal Sphincter (UES)

Controls entry into the esophagus; voluntary control.

Lower Esophageal Sphincter (LES)

Prevents stomach acid reflux into the esophagus.

UES role in airway protection

Prevents food/secretions from entering the trachea during swallowing.

LES Primary Digestive Function

Keeps acid and stomach contents from going the wrong way.

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Esophagus Location

The esophagus runs behind it.

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UES Control & Breathing

Voluntary sphincter that prevents aspiration.

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UES & Aspiration Prevention

Closes to stop food/secretions from entering the trachea.

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LES impact on Stomach

By stopping harmful substances from re-entering.

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