Ch 15 Quiz Questions A & P 1

Your page rank:

Total word count: 2907
Pages: 11

Calculate the Price

- -
275 words
Looking for Expert Opinion?
Let us have a look at your work and suggest how to improve it!
Get a Consultant

In the uterus ________.

Select one:
a. despite the fact that the fetus cannot see, functional visual cortical connections are established

b. the fetus can see only light and shadow, but not forms, so partial visual connections are made

c. scanty visual connections are made that proliferate greatly during infancy

d. the fetus cannot see and therefore visual cortical connections are not made

a. despite the fact that the fetus cannot see, functional visual cortical connections are established

Damage to the medial recti muscles would probably affect ________.
Select one:
a. accommodation
b. pupil constriction
c. refraction
d. convergence

d. convergence

Motion sickness seems to ________.

Select one:
a. result from mismatch between visual and vestibular inputs
b. respond best to medication taken after salivation and pallor begins
c. result from activation of nausea centers in the brain stem
d. respond best to medication that "boosts" vestibular inputs

a. result from mismatch between visual and vestibular inputs

Olfactory cells and taste buds are normally stimulated by ________.
Select one:
a. movement of a cupula
b. the movement of otoliths
c. substances in solution
d. stretching of the receptor cells

c. substances in solution

Taste buds are not found ________.
Select one:
a. in circumvallate papillae
b. in filiform papillae
c. lining the buccal cavity
d. in fungiform papillae

b. in filiform papillae

Seventy percent of all sensory receptors are located in the ________.
Select one:
a. skin
b. eye
c. nose
d. ears

b. eye

The first vestiges of eyes in the embryo are called ________.
Select one:
a. optic cups
b. mesenchyme
c. optic discs
d. optic vesicles

d. optic vesicles

Tinnitis, vertigo, and gradual hearing loss typify the disorder called ________.

Select one:
a. motion sickness
b. Ménière’s syndrome
c. strabismus
d. conjunctivitis

b. Ménière’s syndrome

Which of the following could not be seen as one looks into the eye with an ophthalmoscope?
Select one:
a. optic chiasma
b. macula lutea
c. optic disc
d. fovea centralis

a. optic chiasma

Which of the following structures is not part of the external ear?
Select one:
a. tympanic membrane
b. external acoustic meatus
c. pharyngotympanic tube
d. pinna

c. pharyngotympanic tube part of middle ear– leads to nasopharynx

During dark adaptation ________.

Select one:
a. the cones are activated
b. rhodopsin accumulates in the rods
c. the sensitivity of the retina decreases
d. the rate of rhodopsin breakdown is accelerated

b. rhodopsin accumulates in the rods remember– rhodopsin accumulates in rods when it is dark (this increases sensitivity to light)

The receptor for static equilibrium is the ________.
Select one:
a. semicircular canals
b. utricle
c. cochlear duct
d. macula

d. macula

As sound levels increase in the spiral organ (of Corti), ________.
Select one:
a. outer hair cells bend the cilia away from the kinocilium
b. inner hair cells bend the cilia away from the kinocilium
c. outer hair cells stiffen the basilar membrane
d. inner hair cells stiffen the basilar membrane

c. outer hair cells stiffen the basilar membrane

U.S. employees must wear hearing protection at ________ dB or above.
Select one:
a. 100
b. 90
c. 80
d. 70

b. 90

The oil component found in tears is produced by the ________.
Select one:
a. ciliary gland
b. conjunctiva
c. tarsal glands
d. lacrimal glands

c. tarsal glands tarsal glands are sebaceous glands in tarsal plates, located behind eyelashes on eyelid cusp; prevent eyelids from sticking together

Conscious perception of vision probably reflects activity in the ________.

Select one:
a. thalamus
b. chiasma
c. superior colliculus
d. occipital lobe of the cortex

d. occipital lobe of the cortex

The receptor membranes of gustatory cells are ________.
Select one:
a. fungiform papillae
b. basal cells
c. gustatory hairs
d. taste buds

c. gustatory hairs taste buds are gustatory organs, not cells. The gustatory hairs on gustatory epithelial cells act as receptor membranes for tastants, which enter through taste pores (bathed in saliva)

What prevents the eyelids from sticking together when the eyes close?
Select one:
a. lacrimal fluid
b. ciliary gland secretions
c. tarsal gland secretions
d. conjunctival fluid

c. tarsal gland secretions

The oval window is connected directly to which passageway?
Select one:
a. scala vestibuli
b. scala tympani
c. pharyngotympanic tube
d. external acoustic meatus

a. scala vestibuli

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 ________.

Select one:
a. lateral geniculate body of the thalamus
b. visual cortex
c. temporal lobe
d. superior colliculi

a. lateral geniculate body of the thalamus

Most newborns ________.
Select one:
a. see in tones of red and green only
b. are myopic
c. often use only one eye at a time
d. cry with copious tears

c. often use only one eye at a time

Which statement about malnutrition-induced night blindness is most accurate?
Select one:
a. The impaired vision is caused by reduced cone function.
b. Vitamin supplements can reverse degenerative changes.
c. The most common cause is vitamin D deficiency.
d. Visual pigment content is reduced in both rods and cones.

b. Vitamin supplements can reverse degenerative changes.

Select the correct statement about equilibrium.

Select one:

a. Cristae respond to angular acceleration and deceleration.

b. The weight of the endolymph contained within the semicircular canals against the maculae is responsible for static equilibrium.

c. Hair cells of both types of equilibrium hyperpolarize only, resulting in an increased rate of impulse transmission.

d. Due to dynamic equilibrium, movement can be perceived if rotation of the body continues at a constant rate.

a. Cristae respond to angular acceleration and deceleration.

Visual processing in the thalamus does not contribute significantly to ________.

Select one:
a. movement perception
b. depth perception
c. high-acuity vision
d. night vision

d. night vision

What structure regulates the amount of light passing to the visual receptors of the eye?
Select one:
a. cornea
b. iris
c. aqueous humor
d. lens

b. iris lens adjusts refraction, cornea is responsible for most refraction, but iris changes amount of light entering

In the visual pathways to the brain, the optic radiations project to the ________.
Select one:
a. optic chiasma
b. lateral geniculate body
c. primary visual cortex
d. medial retina

c. primary visual cortex p. 568

Which of the following is true about light and vision?
Select one:
a. When we see the color of an object, all light is being absorbed by that object except for the color being experienced.

b. Human photoreceptors respond to light in the 100-300 nm range.

c. The greater the incident angle of light striking a refractive surface, the less the amount of light bending.

d. Light is a form of electromagnetic radiation that slows down as it enters a medium of relatively less density.

a. When we see the color of an object, all light is being absorbed by that object except for the color being experienced. P. 558 *Human eyes can respond to visible light (approx. 400-700nm). Light slows as it enters MORE dense mediums.

An essential part of the maculae involved in static equilibrium is (are) the ________.
Select one:
a. cupula
b. spiral organ (of Corti)
c. scala media
d. otoliths

d. otoliths *otoliths increase macula membrane surface area and inertia– necessary functions to detect changes in movement. p. 584

Which of the following is true about photoreceptors?

Select one:
a. Rods absorb light throughout the visual spectrum but confer only gray tone vision.

b. Three types of color-sensitive photoreceptors exist: red, green, and yellow.

c. If all cones are stimulated equally, all colors are absorbed by the cones and the color perceived is black.

d. In dim light, images are focused directly on the rods in the fovea centralis.

a. Rods absorb light throughout the visual spectrum but confer only gray tone vision. *There are red, green, and BLUE cones. If all cones are equally stimulated, you see WHITE. In bright light, images are focused on CONES in the fovea. p. 563

Visual inputs to the ________ serve to synchronize biorhythms with natural light and dark.

Select one:

a. suprachiasmatic nucleus
b. superior colliculi
c. lateral geniculate body
d. pretectal nuclei

a. suprachiasmatic nucleus *P. 569. In the hypothalamus; sets biological rhythms.

Farsightedness is more properly called ________.
Select one:
a. myopia
b. hyperopia
c. presbyopia
d. hypopia

b. hyperopia *P. 561. Hyperopic eye– eye ball is too short; focal point is behind the retina.

Light passes through the following structures in which order?
Select one:
a. cornea, vitreous humor, lens, aqueous humor
b. aqueous humor, cornea, lens, vitreous humor
c. cornea, aqueous humor, lens, vitreous humor
d. vitreous humor, lens, aqueous humor, cornea

c. cornea, aqueous humor, lens, vitreous humor

Which of the following is not a characteristic of olfactory receptor cells?
Select one:
a. They are ciliated.
b. They are unipolar neurons.
c. They are chemoreceptors.
d. They have a short life span of about 60 days.

b. They are unipolar neurons. *False- they are BIPOLAR neurons, each with a knob and cilia protruding from one end.

There are three layers of neurons in the retina. The axons of which of these neuron layers form the optic nerves?
Select one:
a. bipolar cells
b. rod cells
c. cone cells
d. ganglion cells

d. ganglion cells

What is the main function of the rods in the eye?
Select one:
a. depth perception
b. color vision
c. vision in dim light
d. accommodation for near vision

c. vision in dim light *Depth perception is a result of cortical processing and the overlap of both eyes’ visual fields. Color vision is a function of CONES. Accommodation for near vision is the result of the lens bulging.

Ceruminous glands are ________.
Select one:
a. glands found in the lateral corners of your eye
b. modified apocrine sweat glands
c. modified taste buds
d. saliva glands found at the base of the tongue

b. modified apocrine sweat glands ceruminous glands= ear wax production. Modified apocrine sweat glands in ear.

Which of the following taste sensations is incorrectly matched to the chemicals that produce it?
Select one:
a. bitter-alkaloids
b. sweet-organic substances such as sugar and some lead salts
c. sour-acids
d. salty-metal ions
e. umami-amino acids glutamate and lysine

e. umami-amino acids glutamate and lysine *Umami- amino acids glutatamate and ASPARTATE. p 572.

Which statement about sound localization is not true?
Select one:
a. It requires processing at the cortical level.
b. It requires input from both ears.
c. It uses time differences between sound reaching the two ears.
d. It is difficult to discriminate sound sources in the midline.

a. It requires processing at the cortical level. *False- requires processing in the BRAIN STEM NUCLEI, such as the superior olivary nuclei. Relative timing of sound reaching two ears helps determine where the sound is. p. 584.

Which of the follow types of neurons are replaced throughout adult life?

Select one:
a. olfactory receptor cells
b. retinal ganglion cells
c. auditory outer and inner hair cells
d. retinal bipolar cells

a. olfactory receptor cells *Superficial location in olfactory epithelium puts them at risk. Life span: 30-60 days. Olfactory stems cells replace them. p. 570

Dark adaptation ________.
Select one:
a. involves improvement of acuity and color vision
b. is much faster than light adaptation
c. results in inhibition of rod function
d. involves accumulation of rhodopsin

d. involves accumulation of rhodopsin *Rhodopsin is the visual pigment in RODS. Rods are highly sensitive to light and are more active in the dark. When one adapts to the dark, rods "turn back on" and rhodopsin accumulates, increasing retinal sensitivity.

Nerve fibers from the medial aspect of each eye ________.
Select one:

a. pass posteriorly without crossing over at the chiasma
b. cross over to the opposite side at the chiasma
c. go to the superior colliculus only
d. divide at the chiasma, with some crossing and some not crossing

b. cross over to the opposite side at the chiasma p. 568

Select the correct statement about olfaction.
Select one:

a. Some of the sensation of olfaction is actually one of pain.

b. Olfactory receptors have a high degree of specificity toward a single type of chemical.

c. Olfactory adaptation is only due to fading of receptor cell response.

d. Substances must be volatile and hydrophobic in order to activate olfactory receptors.

a. Some of the sensation of olfaction is actually one of pain. *The nose contains many temperature and pain receptors which travel to the CNS via trigeminal nerves. Each smell receptor binds to one or more odor. Must be volatile and DISSOLVE in fluid coating olfactory epithelium. p. 571

The cells of the retina in which action potentials are generated are the ________.
Select one:
a. rods and cones
b. bipolar cells
c. ganglion cells
d. amacrine cells

c. ganglion cells

Which of the following is true about gustatory receptors?
Select one:

a. All gustatory receptors have the same threshold for activation.

b. Complete adaptation occurs in about one to five minutes.

c. The receptors generate an action potential in response to chemical stimuli.

d. In order for a chemical to be sensed, it must be hydrophobic.

b. Complete adaptation occurs in about one to five minutes. *Different gustatory cells have different thresholds for activation. Bitter receptors detect minute amts (protection), but others are less sensitive. Taste receptors adapt completely adapt in 1-5 minutes. Receptors (gustatory epithelial cells) generate GRADED POTENTIALS which release neurotransmitters to associated neurons– these associated neurons conduct APs. p. 573

Visible light fits between ________.
Select one:
a. X rays and UV
b. microwaves and radio waves
c. UV and infrared
d. gamma rays and infrared

c. UV and infrared

Which pairing of terms is incorrectly related?
Select one:
a. frequency: loudness
b. amplitude: sound intensity
c. frequency: wavelength number
d. quality: frequency number

a. frequency: loudness *Amplitude is sound intensity; frequency is amount of wavelengths in a given time; quality is mixing of several frequencies (as in a chord of music). Frequencies differ in pitch, not loudness. p. 580

The blind spot of the eye is where ________.
Select one:
a. only cones occur
b. the macula lutea is located
c. the optic nerve leaves the eye
d. more rods than cones are found

c. the optic nerve leaves the eye *Only cones occur in the FOVEA, which is within the macula lutea. There are NO photoreceptors in the optic disc, as it is the opening where the optic nerve leaves the eye (blind spot). p. 554

The tarsal plate of the eyelid ________.
Select one:
a. is composed of connective tissue surrounding a thin cartilage plate
b. is connected to the superior rectus muscle
c. is connected to the levator palpebrae
d. assists in the act of winking

c. is connected to the levator palpebrae *Tarsal plates are connective tissue sheets within the eyelids which anchor the orbicularis oculi and levator palpebrae muscles. p. 550.

The eye muscle that elevates and turns the eye laterally is the ________.
Select one:
a. medial rectus
b. inferior oblique
c. superior oblique
d. lateral rectus

b. inferior oblique p. 551-552

What is a modiolus?
Select one:
a. bone in the center of a semicircular canal
b. a bony area around the junction of the facial, vestibular, and cochlear nerves
c. a bone pillar in the center of the cochlea
d. bone around the cochlea

c. a bone pillar in the center of the cochlea p. 579

Receptors for hearing are located in the ________.
Select one:
a. tympanic membrane
b. semicircular canals
c. vestibule
d. cochlea

d. cochlea *The spiral organ (organ of Corti) is located in the cochlea. p. 579

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 ________.
Select one:
a. is not a living tissue
b. does not contain connective tissue
c. has no nerve supply
d. has no blood supply

d. has no blood supply *No blood supply means the immune system cannot attack the cornea (immune cells exit capillaries into tissues). p. 552

Information from balance receptors goes directly to the ________.
Select one:
a. visual cortex
b. brain stem reflex centers
c. motor cortex
d. back muscles

b. brain stem reflex centers *Imbalances must be dealt with quickly (think about falling) — thus, they go directly to reflex centers. Impulses go from equilibriium receptors to vestibular nuclei (brain stem) or cerebellum. p. 587

Which of the following is not a possible cause of conduction deafness?
Select one:
a. middle ear infection
b. cochlear nerve degeneration
c. otosclerosis
d. impacted cerumen

b. cochlear nerve degeneration *Conduction deafness=when something hampers sound conduction to inner ear. Sensoineural deafness results from damage to neural structures (anywhere from cochlear hair cells to cortical cells). p. 588

Conscious perception of vision probably reflects activity in the ________.
Select one:
a. chiasma
b. occipital lobe of the cortex
c. superior colliculus
d. thalamus

b. occipital lobe of the cortex *CONSCIOUS perception of vision takes place in the occipital lobe of the cerebral cortex. p. 569

The oval window is connected directly to which passageway?

Select one:
a. scala vestibuli
b. external acoustic meatus
c. pharyngotympanic tube
d. scala tympani

a. scala vestibuli p 581

The receptor for static equilibrium is the ________.
Select one:
a. cochlear duct
b. macula
c. utricle
d. semicircular canals

b. macula *Maculae are found in the utricle and saccule wall (within the vestibule). Macula deal with position of head with respect to gravity (static equilibrium). The saccule/utricle are sacs which house the receptor organs (maculae). p .584.

Farsightedness is more properly called ________.
Select one:
a. myopia
b. hyperopia
c. hypopia
d. presbyopia

b. hyperopia

Share This
Flashcard

More flashcards like this

NCLEX 10000 Integumentary Disorders

When assessing a client with partial-thickness burns over 60% of the body, which finding should the nurse report immediately? a) ...

Read more

NCLEX 300-NEURO

A client with amyotrophic lateral sclerosis (ALS) tells the nurse, "Sometimes I feel so frustrated. I can’t do anything without ...

Read more

NASM Flashcards

Which of the following is the process of getting oxygen from the environment to the tissues of the body? Diffusion ...

Read more

Unfinished tasks keep piling up?

Let us complete them for you. Quickly and professionally.

Check Price

Successful message
sending