Question

Briefly describe how the following actions take place
(i) The oval window of the inner ear vibrates (ii) The pupil of the eye becomes smaller

Answer 1

(i) The three ossicles ( malleus, incus, stapes) transmit the sound to a second window which is called the oval window. Oval window vibrates when it receives the sound waves from the ossicles.

(ii) The pupil is the part of our eye that controls how much light gets in. In bright light, pupils get smaller or constricted to limit the amount of light that enters. It is controlled by the autonomic nervous system.