PATHOLOGY MCQ
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The eardrum is a ____ membrane.
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thin
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thick
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The tympanic membrane (eardrum, myringa) is a thin, semitransparent, oval membrane, approximately 1 cm in diameter, that separates the external acoustic meatus from the tympanic cavity.
Detailed explanation-2: -The tympanic membrane is thin ( 0.1 mm thick), oval, and funnel-shaped. It marks the transition from ectoderm to endoderm and separates the tympanic cavity from the external acoustic meatus and thus from the external regions of the head. It is covered by an outer cuticular layer and an inner mucous layer.
Detailed explanation-3: -Background. Past in vivo studies in humans showed that the tympanic membrane (TM) is permeable to physiological gases.
There is 1 question to complete.