Give the special functional activity of iris of the eye.
Iris:
Function of iris :
Given below is an example of a certain structure and their special functional activity. . Example: Eye and vision.
On a similar pattern complete the following
Ureter :
Given below is an example of certain structures and it's special functional activity.
For example: Eye: vision. On a similar pattern complete the following:
(a) Neurotransmitter: ________