What structure regulates the amount of light passing to the visual receptors of the eye?
a. irisb. corneac. lensd. aqueous humor

a. iris

Explanation:

iris is actually the structure of the eye that regulates the amount of light passing to the visual receptors of the eye

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.

answer; somatic;