Test 12 (chapter 15)
The apex of the ear hears sounds in the range of ________ Hz.
20
U.S. employees must wear hearing protection at ________ dB or above.
90
Helps maintain the intraocular pressure; located in the anterior part of the eye.
Aqueous humor
A condition of deafness that may result from otosclerosis.
Conduction deafness
Can result from impacted cerumen.
Conduction deafness
Can result from the fusion of the auditory ossicles.
Conduction deafness
One of the most common results of otitis media.
Conduction deafness
A condition often leading to blindness due to increased intraocular pressure.
Glaucoma
A condition that can result from a deficiency of vitamin
Night blindness
Which of the following is true about photoreceptors?
Rods absorb light throughout the visual spectrum but confer only gray tone vision.
Loss of hearing resulting from prolonged exposure to high-intensity sounds.
Sensorineural deafness
Select the correct statement about olfaction. A) Olfactory receptors have a high degree of specificity toward a single type of chemical. B) Some of the sensation of olfaction is actually one of pain. C) Substances must be volatile and hydrophobic in order to activate olfactory receptors. D) Olfactory adaptation is only due to fading of receptor cell response.
Some of the sensation of olfaction is actually one of pain
A possible side effect of medications such as aspirin.
Tinnitus
Separates external auditory canal from the middle ear.
Tympanic membrane
Detects acceleration.
Vestibule
Which statement about malnutrition-induced night blindness is most accurate? A) The most common cause is vitamin D deficiency. B) Vitamin supplements will reverse degenerative changes. C) Visual pigment content is reduced in both rods and cones. D) The impaired vision is caused by reduced cone function.
Vitamin supplements will reverse degenerative changes.
Which of the following is true about light and vision?
When we see the color of an object, all light is being absorbed by that object except for the color being experienced.
The ciliary body does not ________.
belong to the anterior chamber of the eye
Receptors for hearing are located in the ________.
cochlea
As sound intensity increases, we hear the sound as a louder sound at the same pitch. This suggests that ________.
cochlear cells that respond to the same pitch vary in responsiveness
Which of the following is not a possible cause of conduction deafness? A) impacted cerumen B) middle ear infection C) cochlear nerve degeneration D) otosclerosis
cochlear nerve degeneration
Light passes through the following structures in which order?
cornea, aqueous humor, lens, vitreous humor
Nerve fibers from the medial aspect of each eye ________.
cross over to the opposite side at the chiasma
Area of greatest visual acuity.
fovea centralis
The cells of the retina in which action potentials are generated are the ________.
ganglion cells
There are three layers of neurons in the retina. The axons of which of these neuron layers form the optic nerves?
ganglion cells
Inhibitory cells in the olfactory bulbs are called ________.
granule cells
Ordinarily, it is not possible to transplant tissues from one person to another, yet corneas can be transplanted without tissue rejection. This is because the cornea ________.
has no blood supply
Farsightedness is more properly called ________.
hyperopia
The middle ear ossicle is the ________.
incus
The eye muscle that elevates and turns the eye laterally is the ________.
inferior oblique
Dark adaptation ________.
involves accumulation of rhodopsin
What structure regulates the amount of light passing to the visual receptors of the eye?
iris
The tarsal plate of the eyelid ________.
is connected to the levator palpebrae
The first way station in the visual pathway from the eye, after there has been partial crossover of the fibers in the optic chiasma, is the ________.
lateral geniculate body of the thalamus
The structure most responsible for focusing light rays that enter the eye.
lens
The receptor for static equilibrium is the ________.
macula
Visual processing in the thalamus does not contribute significantly to ________.
night vision
Conscious perception of vision probably reflects activity in the ________.
occipital lobe of the cortex
Which of the following could not be seen as one looks into the eye with an ophthalmoscope?
optic chiasma
The first vestiges of eyes in the embryo are called ________.
optic vesicles
The boundary of the retina is called the ________.
ora serrata
An inflammation of the lining of the middle ear.
otitis media
Ear stones.
otoliths
As sound levels increase in the spiral organ (of Corti), ________.
outer hair cells stiffen the basilar membrane
Photoreceptors ________.
package visual pigment in membrane-bound discs, which increases the efficiency of light trapping
Connects the middle ear with the nasopharynx.
pharyngotympanic tube
Which of the following structures is not part of the external ear? A) pinna B) external auditory meatus C) tympanic membrane D) pharyngotympanic tube
pharyngotympanic tube
The ________ are in the visual pathway and mediate the pupillary light reflexes.
pretectal nuclei
The optic radiations project to the ________.
primary visual cortex
The sensory layer of the eye.
retina
During dark adaptation ________.
rhodopsin accumulates in the rods
The oval window is connected directly to which passageway?
scala vestibuli
Visual inputs to the ________ serve to synchronize biorhythms with natural light and dark.
suprachiasmatic nucleus
The oil component found in tears is produced by the ________.
tarsal glands
Presbyopia is not ________.
the unequal curvature of refracting surfaces
In the optic ________ the visual fields of the axons are all ipsilateral.
tract
Contains utricle and saccule.
vestibule
What is the main function of the rods in the eye?
vision in dim light
The blind spot of the eye is ________.
where the optic nerve leaves the eye