Question

Which of the following is the correct sequence of structures involved in hearing a sound?

• A. Pinna $\to$ Cochlea $\to$ Tympanic membrane $\to$ Auditory canal $\to$ Malleus $\to$ Stapes $\to$ Incus $\to$ Auditory nerve
• B. Pinna $\to$ Malleus $\to$ Incus $\to$ Stapes $\to$ Auditory canal $\to$ Tympanic membrane $\to$ Cochlea $\to$ Auditory nerve
• C. Pinna $\to$ Tympanic membrane $\to$ Auditory canal $\to$ Cochlea $\to$ Malleus $\to$ Incus $\to$ Stapes $\to$ Auditory nerve
• D. Pinna $\to$ Auditory canal $\to$ Tympanic membrane $\to$ Malleus $\to$ Incus $\to$ Stapes $\to$ Cochlea $\to$ Auditory nerve

Answer 1

The correct option is D

Pinna $\to$ Auditory canal $\to$ Tympanic membrane $\to$ Malleus $\to$ Incus $\to$ Stapes $\to$ Cochlea $\to$ Auditory nerve

Pinna is the external projection of the ear that receives signals in the form of sound vibrations which then passes through the auditory canal to reach the eardrum or tympanum. The pinna, auditory canal, and the eardrum make up the outer ear. Malleus, incus, and stapes are the three tiny bones of the mid-ear while cochlea is a part of the inner ear. The auditory nerve sends the signals to the brain.