Neural Control and CoordinationHard
Question
Function of iris is to
Options
A.move lens forward and backward
B.refract libht rays
C.bring about movements of eye lids
D.alter the size of pupil
Solution
Iris controls the amount of light that reaches the photosenors at the back of the eye. It consists of circular sphincter and radial dilators. The function of iris is to alter the size of pupil.
Create a free account to view solution
View Solution FreeMore Neural Control and Coordination Questions
The largest of the spinal nerves is constituted by the...Choose the correct option for A, B, C and D from the following :-...A fifty year old tree which shows well marked annual rings in its trunk will have :-...Each spinal nerve in a mammal arises from the spinal cord by two roots, a dorsal and a ventral. Of these the ventral roo...The defect of eye develops in the old age because...