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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?

Preventing acid and stomach contents from traveling back up the esophagus Signup and view all the answers

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

The esophagus runs behind the trachea Signup and view all the answers

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

Upper esophageal sphincter (UES) Signup and view all the answers

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

It closes to prevent food and secretions from entering the windpipe Signup and view all the answers

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

By preventing harmful substances from entering the stomach Signup and view all the answers