BMS107 Past Test Questions

BMS107 Past Test Questions
Chapter 19, Spring 2011
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The mucous membrane associated with the eye is the
1. choroid
2. conjunctiva
3. lacrimal apparatus
4. ganglion cell layer
Which one of the following statements is false?
1. The lacrimal gland is located superior to the medial canthus ("corner") of the eye.
2. The lacrimal gland produces lacrimal fluid ("tears").
3. The superior end of the nasolacrimal duct is located near the medial canthus ("corner") of the eye.
4. The inferior end of the nasolacrimal duct is located in the nasal cavity.
The cornea
1. is part of the fibrous tunic of the eye
2. is involved in refraction
3. functions to bend light rays toward a focal point
4. all of the above
Which one of the following is the darkest?
1. sclera
2. choroid layer
3. ciliary body
4. ganglion cell layer
The sphincter pupillae (pupillary constrictor) is located in the
1. cornea
2. sclera
3. iris
4. ciliary body
The ciliary body is
1. part of the retina
2. part of the iris
3. anterior to the iris
4. posterior to the iris
Which one of the following is not part of the ciliary body?
1. lens
2. ciliary muscle
3. pupillary dilator
4. suspensory ligaments
The suspensory ligaments attach the _?_ to the _?_.
1. lens / iris
2. lens / ciliary muscle
3. pupillary constrictor / pupillary dilator
4. anterior chamber / posterior chamber
Contraction of the ciliary muscle allows the eye to
1. see well in a bright environment
2. see well in a dark environment
3. see objects that are far away
4. see objects that are close to the face
Which one of the following has the greatest potential to pull the lens into a relatively tall and thin conformation?
1. contraction of the ciliary muscle
2. contraction of the pupillary constrictor
3. relaxation of the pupillary dilator
4. intraocular pressure increasing tension on suspensory ligaments
Pigments are normally present in all of the following except
1. the choroid
2. the iris
3. the lens
4. the retina
Which layer of the retina is closest to the center of the eye?
1. bipolar cell layer
2. photoreceptor layer
3. ganglion cell layer
The cell bodies of the neurons whose axons form the optic nerves are located in the
1. bipolar cell layer of retina
2. ganglion cell layer of retina
3. optic chiasm
4. thalamus
5. occipital lobes of cerebrum
One neuron in the bipolar cell layer of the retina is likely to synapse with
1. one cone and one rod
2. one cone and one ganglion cell
3. several rods and several ganglion cells
4. several cones and several ganglion cells
Rods
1. are concentrated in the central part of the retina
2. are abundant in the peripheral part of the retina
3. are necessary for visual acuity ("sharp vision")
4. both A. and C.
5. both B. and C.
The _?_ is located within the macula lutea.
1. fovea centralis
2. optic disc
3. both of the above
4. none of the above
The fovea centralis contains large numbers of
1. rods
2. cones
3. axons of ganglion cells
4. blood vessels
5. all of the above
The optic disc
1. is lateral to the fovea centralis
2. is the point at which the optic nerve and blood vessels are attached to the eye
3. contains large numbers of photoreceptors
4. both A. and B.
5. both A. and C.
Which statement is true of the posterior cavity of the eye?
1. is posterior to the lens
2. is divided into the anterior chamber and the posterior chamber
3. contains a gelatinous mass called the vitreous body
4. both A. and C.
5. all of the above
Aqueous humor
1. is constantly produced and constantly reabsorbed
2. fills the anterior chamber
3. fills the posterior chamber
4. is responsible for intraocular pressure
5. all of the above
The surfaces of the tympanic cavity (middle ear cavity) are covered with
1. endolymph
2. hair cells
3. a mucous membrane
4. a serous membrane
The auditory tube passes from the _?_ to the _?_.
1. malleus to the stapes
2. middle ear to the pharynx
3. oval window to the round window
4. bony labyrinth to the membranous labyrinth
Which ossicle is in direct contact with the eardrum?
1. incus
2. stapes
3. malleus
4. none of the above
The stapes is in contact with
1. the malleus and the round window
2. the incus and the oval window
3. the malleus and the oval window
4. the incus and the round window
Because the diameter of the eardrum is greater than the diameter of the oval window,
1. excess air pressure in the middle ear can be released.
2. the inner ear is protected from excessively loud sounds.
3. the pressure of the vibrations received by the inner ear is increased.
4. endolymph fluid is filtrated through the oval window.
The stapedius and the tensor tympani are activated when
1. the air pressure in the middle ear is too high
2. the air pressure in the middle ear is too low
3. the ear is exposed to loud sounds
4. the ear is attempting to hear soft sounds
which statement is true?
1. The bony labyrinth is enclosed in the membranous labyrinth.
2. The membranous labyrinth is enclosed in the bony labyrinth.
3. All parts of the labyrinth are enclosed in the temporal bone.
4. Both A. and C.
5. Both B. and C.
Both the cochlea and the vestibular apparatus
1. contain endolymph
2. contain hair cells
3. are innervated by cranial nerve VIII
4. all of the above
The spiral organ
1. is contained within the cochlea
2. contains hair cells that are able to generate electrical signals when stretched, compressed, or twisted
3. is involved mainly in the sense of equilibrium
4. both A. and B.
5. both B. and C.
Which statement is not true of the semicircular canals?
1. The semicircular canals are part of the cochlea.
2. There are three (3) semicircular canals per ear.
3. The semicircular canals are involved in the sense of equilibrium.
4. The semicircular canals are specialized to detect rotation of the head.
The otolithic membrane
1. is located in the cochlea
2. is located in the semicircular canals
3. is involved in detecting tilt of the head
4. both A. and C.
5. both B. and C.
Which one of the following is most important for equalization of air pressure?
1. auditory tube
2. round window
3. oval window
4. vestibular apparatus

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