Question

Which of the following ear structures is not matched correctly with their functions?

• A. Auditory canal – directs sound wave to eardrum
• B. Eardrum – vibrates and transmits sound waves
• C. Ear ossicles – amplify sound waves
• D. Cochlea – helps in body balance

Answer 1

The correct option is D

Cochlea – helps in body balance

The correct option is D.

Explanation for correct option:

1. The cochlea is present in the inner ear and it looks like a snail shell.
2. Inside the cochlea, there is a fluid called endolymph.
3. It contains the vestibular system which helps in maintaining body balance.
4. It is a part of the sensory system and it provides information about balance, motion, and the location of the head and body in relation to the surroundings.

Explanation for incorrect options:

Option (A):

1. The auditory canal or ear canal is a tube-like structure. It extends from the outer ear to the eardrum.
2. The ear canal and the outer cartilages of the ear are together called the outer ear.
3. This ear canal takes the sound from the outer ear to the eardrum.

Option (B):

1. The eardrum is a thin flap of skin that is stretched tight like a drum. It starts to vibrate when a sound reaches it.
2. These vibrations move the three small bones of the middle ear, which send vibrations to the inner ear.

Option (C):

1. The ossicles are the three small bones in the inner ear.
2. They are malleus (hammer), incus (anvil), and stapes (stapes).
3. Malleus helps in moving the vibration from the tympanum to the incus.
4. Incus connects both malleus and stapes.
5. Stapes connect the incus to the vestibule present in the inner ear.

Final answer: Cochlea – helps in body balance is not matched correctly with its functions.