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Smooth muscle that controls light intensity?
The smooth muscle in the iris of the eye controls the size of the pupil, which regulates the amount of light entering the eye. When this muscle contracts, the pupil constricts, reducing the amount of light that enters the eye, and when it relaxes, the pupil dilates to allow more light in.
What layer dialates the pupil?
The layer that dilates the pupil is the iris, which is the colored part of the eye. Within the iris, the dilator pupillae muscle is responsible for widening the pupil in response to low light conditions or during the fight-or-flight response. This process is controlled by the sympathetic nervous system.
Pupil gets larger it dilates pupil gets smaller it?
Contracts
Any drug that dilates the pupil of the eye is called?
Prozac can dilate the pupil of the eye.
What is the muscle that makes the pupil smaller in bright light?
Smooth Muscles.
Where does the iris go when your pupil dilates?
When your pupil dilates, the iris expands outward and becomes thinner, allowing more light to enter the eye. The iris doesn't physically move or change position when the pupil dilates; it simply adjusts its shape to regulate the amount of light entering the eye.
What is the black hole in the center of the iris?
The black circle in the middle of the iris in your eye is called a pupil. It dilates to adjust with sunlight.
When the radial muscles of the iris contract, what effect does this have on the size of the pupil?
When the radial muscles of the iris contract, the pupil dilates or becomes larger.
The iris is composed primarily of two smooth muscle layers?
the radial fibers contract,enlarging the pupil and allowing more light to enter the eye
What part of the eye controls the amount of light passing into the eye?
The iris controls the amount of light passing into the eye by adjusting the size of the pupil. In bright light, the iris contracts to make the pupil smaller, and in dim light, it dilates to make the pupil larger.
What muscle is responsible for mydriasis?
a group of smooth muscles called sphincter pupillae cause the pupil constriction which is known as mydriasis.
Which cranial nerve control contraction of the circular smooth muscle of the iris?
The parasympathetic fibers of the oculomotor nerve (cranial nerve III) control the contraction of the circular smooth muscle of the iris, causing pupil constriction.
