25 Questions
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.
False
The iris contains pigment cells responsible for characteristic eye color.
True
Contraction of the sphincter pupillae causes the pupil to dilate.
False
The ciliary muscle is under the control of the somatic nervous system.
False
Acetylcholine released from postganglionic neurons causes relaxation of the radial muscle group.
False
Contraction of the ______ pupillae causes the pupil to dilate.
sphincter
The ______ pupillae receives sympathetic innervation.
sphincter
The ______ muscle is under the control of the somatic nervous system.
ciliary
The ______ is a transparent structure that provides fixed refraction to focus light onto the retina.
lens
The ______ is located behind the pupil.
cornea
The ______ is composed of contractile skeletal muscle to control the size of the pupil.
iris
Acetylcholine released from ______ neurons causes relaxation of the radial muscle group.
postganglionic
The ciliary muscle is under the control of the ______ nervous system.
somatic
The cornea is located ______ the pupil.
behind
The lens is a transparent structure that provides fixed refraction to focus light onto the ______.
retina
Contraction of the sphincter pupillae causes the pupil to ______.
dilate
The ______ system is used to measure doses in the apothecaries' system.
grain
The conversion from apothecaries' system to ______ system is provided in Table 1.
metric
To convert 9 fluid ounces to milliliters, the ______ unit is used.
milliliter
The conversion from 500 ______ to grams is required in one of the questions.
micrograms
The ______ system is used to measure body weight in one of the conversions.
pound
The conversion from milliliters to ______ ounces is required in one of the questions.
fluid
Learn about the different structures of the eye such as the pupil, cornea, lens, and iris. Understand their functions and how they work together to allow light to enter and stimulate the retina.
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