Question

Which of the following statements is correct?
A. The internal ear receives sound waves and directs them to the eardrum.
B. The membranous canals are suspended in the endolymph of the bony canals.
C. The ear ossicles increase the efficiency of the transmission of sound waves to the inner ear.
D. The malleus is attached to the oval window and the stapes are attached to the temporal membrane of the cochlea.

Answer 1

Hint:
The ear can be subdivided into three parts i.e., outer ear, middle ear, and inner ear.

Complete answer:
Pinna constitutes the external ear. The external auditory canal receives sound waves and transmits to them the middle ear through the eardrum. The eardrum is circular and flexible in shape and they start vibrating once incoming sound waves strike it.
The middle ear includes ossicles and three minuscule bones known as malleus, incus, and stapes. Between the eardrum and the inner ear through the oval window, these bones form a bridge. The malleus is affixed with the tympanic membrane while stapes are affixed with the oval window of the cochlea. The inner ear includes the cochlea and it has a spiral-shaped structure. The membranous canals are suspended in the perilymph of the bony canals.
The main function of the ossicles is to transmit sound waves from the outside environment to the inner ear. In addition to this its transports noises from the surrounding environment to the cochlea.
Hence the correct answer is The ear ossicles increase the efficiency of transmission of sound waves to the inner ear. .

Option ‘C’ is correct

Note:
Failure to receive electric impulses in the brain is a sign of a defect in the ear and a warning sign that there is something wrong in the auditory system.