Which of the following consists of a thin membrane in the ear that starts vibrating on receiving sound waves?

Pinna

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Eardrum

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Ear canal

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Cochlea

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Solution

The correct option is B Eardrum
The eardrum consists of a thin membrane called tympanic membrane, which receives sound, and starts vibrating. Its primary function is to transmit the sound from the air to the bones present inside the middle ear.

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\begin{matrix} Parts & Function (a) External ear & (i) Amplifies the vibrations received on the tympanic membrane. (b) Middle Ear & (i i) Converts the vibrations into nerve impulses and sends them to brain. (c) Inner Ear & (i i i) Directs the sound waves towards the tympanic membrane. \end{matrix}

The membrane-like structure in the ear which receives vibrations, thus enabling us to hear sound is called ___.

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