Question

question 33 (1. / points)
what is the primary function of cerumen?
a) lubricates ossicles
b) softens tympanic membrane
c) prevents water from entering middle ear
d) cleans and lubricates the external auditory canal

Explanation:

Cerumen, also known as earwax, is produced in the external auditory canal. Its main functions include cleaning (by trapping dust, debris, and foreign particles) and lubricating the external auditory canal. It does not lubricate the ossicles (which are in the middle ear and have their own physiological environment), it does not soften the tympanic membrane (the eardrum has its own structural integrity and moisture balance not dependent on cerumen for softening), and while it can provide some barrier - like properties, its primary role is not specifically to prevent water from entering the middle ear (the tympanic membrane is the main barrier for the middle ear against water).

Answer:

D. cleans and lubricates the external auditory canal