Question

The iris in the human eye contracts and expands, controlling the amount of light that reaches the retina. What types of muscle control this?

skeletal and voluntary
smooth and cardiac
skeletal and smooth
smooth and involuntary

Answer 1

smooth and involuntary

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Step-by-step explanation:

Answer 2

Answer:smooth and involuntary

Explanation:the sphincter papillae are muscles responsible for narrowing the pupil, while the dilator papillae makes the pupil larger. Both of them are smooth types of muscles, that are controlled by nerves, sending signals from the brain about the light conditions.