16 Questions
What is the name of the high-velocity eye movements that keep the image focused on the fovea centralis?
Saccadic eye movements
Which part of the ear contains the scala media or cochlear duct filled with endolymph?
Cochlea
What occurs in the pigment epithelial cells?
Conversion of all-trans-retinol to 11-cis-retinal
What is the main factor that determines visual acuity?
Resolving power
What is the role of phosphodiesterase in the visual cycle of retinal rod cells?
Converting cGMP to GMP
Where are the sensory hair cells located in the cochlea?
Basilar membrane
What effect does dissociation of rhodopsin have on the G-protein/2nd messenger system?
Closes the Na+ channels
What happens when a person enters a dark room after being in the light, as per dark adaptation?
There are fewer photopigments in the rods and cones
What is the typical ratio of cones to ganglion cells?
105:1
In what condition does the convergence of rods onto a single ganglion cell increase light sensitivity?
Macular degeneration
What is the main cause of blindness in people with age-related macular degeneration (AMD)?
Loss of retinal pigment epithelium
What type of receptive fields do some ganglion cells have?
On-center fields and off-center fields
Which specialized epithelium houses hair cells for detecting linear acceleration?
Macula
What is embedded in the gelatinous otolithic membrane in the utricle and saccule?
Otoliths
What eye movement is produced when a person's body is spinning?
Vestibular nystagmus
Which condition is characterized by rotational vertigo, vestibular nystagmus, and tinnitus?
Meniere's disease
Test your knowledge of visual fields, retinal field, visual acuity, and control of eye movement with this quiz based on Chapter 10 of the 15th edition of Fox's book. Questions cover topics such as resolving power, measurement of visual acuity, and types of eye movements.
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