Overview of the Eye Structures
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Questions and Answers

The cornea is located behind the pupil.

False

The lens is a transparent structure that provides fixed refraction to focus light onto the retina.

False

The iris is composed of contractile skeletal muscle to control the size of the pupil.

False

The sphincter pupillae receives sympathetic innervation.

<p>False</p> Signup and view all the answers

The iris contains pigment cells responsible for characteristic eye color.

<p>True</p> Signup and view all the answers

Contraction of the sphincter pupillae causes the pupil to dilate.

<p>False</p> Signup and view all the answers

The ciliary muscle is under the control of the somatic nervous system.

<p>False</p> Signup and view all the answers

Acetylcholine released from postganglionic neurons causes relaxation of the radial muscle group.

<p>False</p> Signup and view all the answers

Contraction of the ______ pupillae causes the pupil to dilate.

<p>sphincter</p> Signup and view all the answers

The ______ pupillae receives sympathetic innervation.

<p>sphincter</p> Signup and view all the answers

The ______ muscle is under the control of the somatic nervous system.

<p>ciliary</p> Signup and view all the answers

The ______ is a transparent structure that provides fixed refraction to focus light onto the retina.

<p>lens</p> Signup and view all the answers

The ______ is located behind the pupil.

<p>cornea</p> Signup and view all the answers

The ______ is composed of contractile skeletal muscle to control the size of the pupil.

<p>iris</p> Signup and view all the answers

Acetylcholine released from ______ neurons causes relaxation of the radial muscle group.

<p>postganglionic</p> Signup and view all the answers

The ciliary muscle is under the control of the ______ nervous system.

<p>somatic</p> Signup and view all the answers

The cornea is located ______ the pupil.

<p>behind</p> Signup and view all the answers

The lens is a transparent structure that provides fixed refraction to focus light onto the ______.

<p>retina</p> Signup and view all the answers

Contraction of the sphincter pupillae causes the pupil to ______.

<p>dilate</p> Signup and view all the answers

The ______ system is used to measure doses in the apothecaries' system.

<p>grain</p> Signup and view all the answers

The conversion from apothecaries' system to ______ system is provided in Table 1.

<p>metric</p> Signup and view all the answers

To convert 9 fluid ounces to milliliters, the ______ unit is used.

<p>milliliter</p> Signup and view all the answers

The conversion from 500 ______ to grams is required in one of the questions.

<p>micrograms</p> Signup and view all the answers

The ______ system is used to measure body weight in one of the conversions.

<p>pound</p> Signup and view all the answers

The conversion from milliliters to ______ ounces is required in one of the questions.

<p>fluid</p> Signup and view all the answers

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