Exam 15: The Special Senses

A) tarsal gland secretions
B) lacrimal fluid
C) ciliary gland secretions
D) conjunctival fluid

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A) The patient will not be able to localize the origin of sounds.
B) The patient will have increased sensitivity to sound in the unaffected ear.
C) The patient will have a loss of balance with dizziness and vertigo.
D) The patient will not be able to track objects with the eye on the same side as the hearing loss.

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A) olfactory receptor cells
B) auditory outer and inner hair cells
C) retinal ganglion cells
D) retinal bipolar cells

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A) Rods contain a single kind of visual pigment.
B) Cones come in three types,each sensitive to different wavelengths of light.
C) The foveae are densely packed with cones.
D) As many as 100 cones may converge on one ganglion cell.

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A) result from activation of nausea centers in the brain stem
B) result from mismatch between visual and vestibular inputs
C) respond best to medication that "boosts" vestibular inputs
D) respond best to medication taken after salivation and pallor begins

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A) A single cone photoreceptor often connects to a single bipolar cell and a single ganglion cell while as many as 100 rods will converge to a single ganglion cell.
B) There are many more cone photoreceptors in the eye than rod photoreceptors.
C) There are several types of cone photoreceptors,each of which enrich the clarity and resolution of vision.
D) A larger proportion of the brain's visual cortex is active during the day when our cone photo receptors are most active.

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A) The impaired vision is caused by reduced cone function.
B) Visual pigment content is reduced in cones more than rods.
C) Vitamin supplements can reverse degenerative changes.
D) The most common cause is vitamin D deficiency.

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A) taste buds
B) basal cells
C) gustatory hairs
D) fungiform papillae

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A) the macula lutea interrupts the nerve pathway
B) there are no photoreceptors where the optic nerve leaves the eye
C) an absents of cones in the foveae
D) more rods than cones within the retina

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A) This will help to reduce the lateral flection of the head and will prevent hyper polarization or depolarization of the hair cells in the macula.
B) This helps keep the motions detected by the eyes congruent (aligned) with the motions sensed by the vestibular apparatus.
C) Reducing the inertia of head spin will reduce the flow of endolymph that deflects the hair cells of the crista ampullaris.
D) When the eyes send a static vision of stability to the brain,it is tricked into believing the body is still and therefore dizziness will not occur.

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A) The nutrients and waste products of the anterior segment diffuse into and through the vitreous humor of the posterior segment.
B) The metabolic activity of these cells is very low.They produce little waste and need few nutrients.
C) These cells,like the cells of the corneal layer of the integument are not living cells.
D) The aqueous humor is continuously replenished and flows from the ciliary process to drain in the scleral venous sinus.

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A cataract is a clouding of the lens tha...

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