chapter 9 general senses

visual pigments are derivatives of

Retinal

a viral infective involving the vestibular nuclei may result in

a sense of dizziness

loss of lens transparency is referred to as

a cataract

a movement in the vertical plane, such as falling straight down while the body maintains the anatomic position, would be sensed by the

saccules

sound waves are converted into mechanical movements by the

auditory ossicles

the branch of the cranial nerve that is responsible for monitoring changes in equilibrium is the ______ branch

vestibular

movement of the sensory receptors in the ampullae of the semicircular canals

stimulates the receptor cells, alerting us to rotational movement

each of the following statements concerning vision is true EXCEPT one. Identify the exception

Depth perception is improved when one eye is closed.

When all three cones populations are stimulated, one sees

white

stereoscopic vision results when the

images in each eye are slightly different

the space between the iris and the cornea is

anterior chamber

the lens of the eyes thicken when the

ciliary muscles contract

the vitreous body

helps to stabilize the eye and give support to the retina

which of the following extrinsic eye muscles is responsible for rotating the eye laterally?

lateral rectus

the lacrimal glands

A and B only

an example of neuronal replacement in the adult human involves the

olfactory receptors

which of the following concerning olfaction is false?

human power of olfaction is as powerful as most other mammals

olfactory glands

produce a pigmented mucus that covers the olfactory epithelium

sensory receptors that respond to changes in blood pressure are called

baroreceptors

olfactory receptors are examples of

chemoreceptors

the perception of pain coming from parts of the body that are not actually stimulated is called

referred pain

nociceptors are sensitive to

pain

our perception of the environment is incomplete because

A and B only

the fading of a smell some time after you enter a room is an example of experiencing

sensory adaption

the special senses are

all of the above

night blindness can be treated by administering

vitamin A

factors associated with blindness include all of the following except

myopia

visual acuity is also known as

clarity of vision

_____ deafness results from conditions in the middle ear that blocks the normal transfer of vibrations from the tympanum to the oval window

conduction

normal eye focusing is termed

emmetropia

hyperopia is a visual condition and it is also known as

farsightedness

the function of gustatory receptors parallels that of

olfactory receptors in the nose

treatment of a cataract usually involves the removal of the

lens

a device that monitors the activity of the photoreceptor cells of the eyes indicates that there is a constant flow of neurotransmitter being released by the photoreceptor cells. this information implies that the subject is

in a dark room

the anterior cavity

is filled with aqueous humor

when viewing an object close to you, your lens should be more

rounded

a sudden flash of bright light would

cause contraction of the pupillary constrictor muscles

which of the following is filled with air

middle ear cavity

the frequency of a sound is indicated to the nervous system by the

region of organ of corti that is stimulated

the amplitude of vibrations is measured in

decibels

the structure that separates the cochlear duct from the tympanic duct is the

basilar membrane

the structure that overlies the organ of Corti is the

tectorial membrane

the sense of hearing is provided by the receptors of the

inner ear

a structure that allows the middle ear to communicate with the nasopharynx is the

auditory tube

the smallest ossicle is the

stapes

the ossicles connect th

tympanic membrane to the oval window

which of the following contains pain receptors

both a and b

which descending pathway is the spinal cord is responsible for carrying reflex information maintaining postural muscle tone

vestibulospinal

as nerve fibers from the retina travel to the brain, axons from the

nasal half of each eye cross over

temperature senses use two types of

free nerve endings