Sympathetic nerve fibers stimulate contraction of which of the muscle fibers of the iris?
A) Muscle fibersof the circular group
B) Muscle fibers of the radial group

Name: Sympathetic nerve fibers stimulate contraction of which of the muscle fibers of the iris? A) Muscle fibersof the circular group B) Muscle fibers of the radial group
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Question

Quizplus · Accepted Answer

Sympathetic nerve fibers stimulate the contraction of the muscle fibers of the radial group in the iris, which leads to pupil dilation (mydriasis).

Sympathetic Nerve Fibers Stimulate Contraction of Which of the Muscle