Question:
Given below are two statements:
Statement (I): Auditory tube equalizes the air pressure on both site of tympanic membrane.
Statement (II): Auditory tube is lined by ciliated pseudostratified columnar epithelium.
In light of the above statements,choose the most appropriate answer from the options given below.
Given below are two statements:
Statement (I): Auditory tube equalizes the air pressure on both site of tympanic membrane.
Statement (II): Auditory tube is lined by ciliated pseudostratified columnar epithelium.
In light of the above statements,choose the most appropriate answer from the options given below.
Statement (I): Auditory tube equalizes the air pressure on both site of tympanic membrane.
Statement (II): Auditory tube is lined by ciliated pseudostratified columnar epithelium.
In light of the above statements,choose the most appropriate answer from the options given below.
Show Hint
Since the auditory tube connects to the nasopharynx, it shares the same respiratory lining (ciliated pseudostratified columnar epithelium) and helps equalize pressure in the middle ear.
Updated On: Aug 3, 2026
- Both Statement (I) and Statement (II) are true.
- Both Statement (I) and Statement (II) are false.
- Statement (I) is true but Statement (II) is false.
- Statement (I) is false but Statement (II) is true.
Show Solution
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
The auditory tube (Eustachian tube) is a biological canal that connects the tympanic cavity (middle ear) to the nasopharynx.
Its primary function is to maintain pressure equilibrium across the tympanic membrane (eardrum), and its mucosal lining reflects its connection to the respiratory tract.
Step 2: Detailed Explanation:
Let us evaluate both statements:
- Statement (I): The auditory tube is normally closed but opens during swallowing, yawning, or vocalizing.
This opening allows air to flow between the pharynx and the middle ear, equalizing the atmospheric pressure on both sides of the tympanic membrane.
This prevents the membrane from rupturing during rapid environmental pressure changes, making Statement (I) true.
- Statement (II): Because the auditory tube is an extension of the upper respiratory tract (nasopharynx), its mucosal lining is histologically identical.
It is lined by ciliated pseudostratified columnar epithelium (respiratory epithelium) containing goblet cells.
The cilia beat toward the pharynx, helping to drain secretions and debris away from the middle ear cavity.
Thus, Statement (II) is also true.
Step 3: Final Answer:
Both Statement (I) and Statement (II) are true. This corresponds to option (A).
The auditory tube (Eustachian tube) is a biological canal that connects the tympanic cavity (middle ear) to the nasopharynx.
Its primary function is to maintain pressure equilibrium across the tympanic membrane (eardrum), and its mucosal lining reflects its connection to the respiratory tract.
Step 2: Detailed Explanation:
Let us evaluate both statements:
- Statement (I): The auditory tube is normally closed but opens during swallowing, yawning, or vocalizing.
This opening allows air to flow between the pharynx and the middle ear, equalizing the atmospheric pressure on both sides of the tympanic membrane.
This prevents the membrane from rupturing during rapid environmental pressure changes, making Statement (I) true.
- Statement (II): Because the auditory tube is an extension of the upper respiratory tract (nasopharynx), its mucosal lining is histologically identical.
It is lined by ciliated pseudostratified columnar epithelium (respiratory epithelium) containing goblet cells.
The cilia beat toward the pharynx, helping to drain secretions and debris away from the middle ear cavity.
Thus, Statement (II) is also true.
Step 3: Final Answer:
Both Statement (I) and Statement (II) are true. This corresponds to option (A).
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