Which term refers to the black hole in the center of the iris that controls the amount of light entering the eye?

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Prepare effectively for the Challenge A Anatomy Test. Use flashcards and multiple choice questions with detailed explanations and hints to increase your understanding and retention. Prepare with the right tools to boost your exam readiness!

Multiple Choice

Which term refers to the black hole in the center of the iris that controls the amount of light entering the eye?

The opening in the center of the iris that controls how much light enters the eye is called the pupil. It acts as the entryway for light, and its size is adjusted by the iris muscles: in bright light the pupil constricts to reduce light entry, and in dim light it dilates to let in more light. The dark appearance comes from the fact that light that passes through is not reflected back, so the opening looks black. The other structures have different roles: the retina is the light-sensitive tissue at the back of the eye; the sclera is the tough white outer coating; and the vitreous humor is the clear gel filling the main chamber.

Which term refers to the black hole in the center of the iris that controls the amount of light entering the eye?

Prepare effectively for the Challenge A Anatomy Test. Use flashcards and multiple choice questions with detailed explanations and hints to increase your understanding and retention. Prepare with the right tools to boost your exam readiness!

Which term refers to the black hole in the center of the iris that controls the amount of light entering the eye?

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