What causes the size of pupil to decrease during bright light
A. contraction of circular muscles of iris
B. contraction of radial muscles of iris
C. relaxation of circular muscle of iris
D. relaxation of radial muscle of iris
Answer:A
What causes the size of pupil to decrease during bright light
A. contraction of circular muscles of iris B. contraction of radial muscles of iris C. relaxation of circular muscle of iris D. relaxation of radial muscle of iris