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Edinger-Westphal nucleus of the brainstem controls the pupil reflex. An ER Doctor Who looks at the response to a pen light is checking on brain stem activity.

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Q: What part of brain controls pupil dilation?
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What structure is the visible colored part of the eye that controls pupil dilation?

The visible colored part of the eye that controls pupil dilation is the iris. The iris regulates the size of the pupil in response to light conditions and helps to control the amount of light that enters the eye.


What is the name of the eye that controls how much light passes through the pupil is called the?

The iris is the part of the eye that controls the size of the pupil and regulates the amount of light that enters the eye.


The colored part of the human eye that controls how much light passes through pupil is called?

The colored part of the human eye that controls how much light passes through the pupil is called the iris.


The coloured part of the human eye that controls how much light passes through the pupil is called what?

The colored part of the human eye that controls how much light passes through the pupil is called the iris.


What part of your brain controls breathing?

The brain stem is the part that controls breathing, it is the stem that allows the respiratory system to work and help you breathe


What part of the brain controls and breathing?

brain stem


What part of the brain controls testing of heat?

The part of the brain called the Cnifiliatispin controls all testing of heat conditions.


Where is the pupil in your eye?

The pupil is the opening in the center of the iris (the colored part of the eye) that allows light to enter the eye. By dilating or constricting, the pupil controls the amount of light reaching the retina at the back of the eye.


What part of your nrvous system controls open and close pupil?

The third cranial nerve.


What part of the brain controls hope?

To the extent that there can be said to be such a thing as a "part of the brain that controls hope", it's probably the prefrontal cortex.


What part of the brain controls the rate of your breathing?

brain stem


What part of the brain controls posture?

Action potential in the brain