Question

The organ that helps in hearing is

• A. Cochlea
• B. Organ of Corti
• C. Semicircular canals
• D. Ear ossicles

Answer 1

The correct option is B

Organ of Corti

The correct option is B:

Explanation for the correct option:

1. The receptors associated with the sense of hearing form a structure called the organ of Corti.
2. It mainly consists of a tectorial membrane, sensory hair cells, and a basilar membrane.
3. It is responsible for sending sound impulses to the brain through the auditory nerve.

Explanation for the incorrect options:

Option-A:

1. It is a highly coiled tube that appears like a snail.
2. It is about 35mm long.
3. The vestibular membrane and basilar membrane divide the cochlea internally into three parts vestibular canals (scala vestibule) the middle canal (scala media) and the tympanic canal (scala tympani).
4. The organ of Corti is located inside the scala media(cochlear duct).
5. Scala vestibule and scala tympani are filled with a fluid called perilymph.
6. Scala media is filled with a fluid called endolymph.

Option-C:

1. The vestibular apparatus of the inner ear consists of a utricle, saccule, and three semicircular canals.
2. The balance receptors (hair cells) are present in the utricle, saccule, and ampulla of the three semicircular canals.
3. These semicircular canals are arranged right angle to each other.
4. They are filled with a liquid called endolymph.
5. The vestibules and three semicircular canals of the human inner ear maintain the body's balance or equilibrium.

Option-D:

1. These are three bones (malleus, incus, and stapes) in the middle ear.
2. They are articulated to form a chain for the transmission of sound from the external ear to the internal ear.
3. Stapes is the third ossicle and smallest bone of the human body it appears like a stirrup.'
4. Incus is the second ossicle and it appears like an anvil.
5. Malleus is the first ear ossicle and it appears like a hammer.

Final answer: The organ that helps in hearing is the Organ of Corti.