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Chapter 14 Quiz
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Chapter 14 Quiz
Quiz Content
*
not completed
.
In vestibular receptors, the stimulus perceived is
pressure.
correct
incorrect
chemicals.
correct
incorrect
sound.
correct
incorrect
body position and movement.
correct
incorrect
*
not completed
.
How does the CNS differentiate between sensory signals from the PNS?
The action potentials are slightly different for each sense.
correct
incorrect
The different sensory pathways project to different areas of the cerebral cortex.
correct
incorrect
Some senses only produce graded potentials.
correct
incorrect
The frequencies of action potentials from each sensory modality are different.
correct
incorrect
*
not completed
.
Which mammalian skin mechanoreceptor cell is considered extremely phasic?
Merkel disk
correct
incorrect
Hair cell
correct
incorrect
Pacinian corpuscle
correct
incorrect
Ruffini ending
correct
incorrect
*
not completed
.
Which structure is most commonly used as the auditory organ in insects?
Semicircular canals
correct
incorrect
Statocyst
correct
incorrect
Tympanal organ
correct
incorrect
Hair cells
correct
incorrect
*
not completed
.
Which of the following does
not
directly relate to transduction of an aspect of sound?
The magnitude of hair cell bending
correct
incorrect
The location (population) of hair cells bending
correct
incorrect
The direction of hair cell bending
correct
incorrect
The number of action potentials coming from the hair cell
correct
incorrect
*
not completed
.
Which statement regarding the transduction mechanism of the hair cell is true?
Displacement of the hair cell bundle toward the tallest stereocilia depolarizes the membrane.
correct
incorrect
The vibration of the hair cell bundle produces an action potential on the membrane.
correct
incorrect
Displacement of the hair cell bundle in any direction depolarizes the membrane.
correct
incorrect
Displacement of the hair cell bundle toward the shortest stereocilia depolarizes the membrane.
correct
incorrect
*
not completed
.
Which statement regarding the mechanism of hearing is
false
?
Sound travels into the semicircular canal and vibrates the tectorial membrane.
correct
incorrect
The sound amplitude relates to the amount of hair cell membrane depolarization.
correct
incorrect
Inner hair cells are responsible for most of the afferent signal to the brain.
correct
incorrect
High frequency sounds tend to bend hair cells near the oval window.
correct
incorrect
*
not completed
.
In the taste sensilla of
Drosophila
, which substance would likely elicit action potentials in a deterrent cell?
1 m
M
KCl
correct
incorrect
30 m
M
sucrose
correct
incorrect
50 m
M
NaCl
correct
incorrect
quinine
correct
incorrect
*
not completed
.
Which taste quality mechanism involves a G protein receptor?
Sweet
correct
incorrect
Salty and sour
correct
incorrect
Bitter and sweet
correct
incorrect
Bitter, sweet, and umami
correct
incorrect
*
not completed
.
Which sense has a receptor cell that directly produces an action potential?
Hearing
correct
incorrect
Olfactory
correct
incorrect
Taste
correct
incorrect
Vision
correct
incorrect
*
not completed
.
Which is the most likely mechanism for odorant receptor molecules in mammals?
Odorant receptors initiate a G protein-mediated signal cascade, which ultimately opens a cyclic nucleotide-gated cation channel.
correct
incorrect
Odorant receptors bind to the odorant molecule and open, producing a depolarization.
correct
incorrect
Odorant receptors initiate a G protein-mediated signal cascade, which ultimately produces a metabotropic action.
correct
incorrect
Odorant receptors initiate a G protein-mediated signal cascade, which ultimately opens potassium channels.
correct
incorrect
*
not completed
.
In many vertebrates, _______ predominantly detect(s) pheromones.
specialized taste buds
correct
incorrect
the olfactory system
correct
incorrect
the vomeronasal organ
correct
incorrect
internal chemoreceptors
correct
incorrect
*
not completed
.
In the vertebrate eye, the main transduction event takes place
on the iris.
correct
incorrect
at the cornea.
correct
incorrect
in the retina.
correct
incorrect
at the lens.
correct
incorrect
*
not completed
.
_______ is the vertebrate sense in which the "resting," or unexcited, condition of the receptor is depolarized.
Touch
correct
incorrect
Smell
correct
incorrect
Vision
correct
incorrect
Hearing
correct
incorrect
*
not completed
.
Which statement best describes the first major transduction event in the vertebrate eye?
Retinal changes from
cis
- to
trans
-isomer.
correct
incorrect
Opsin changes conformation.
correct
incorrect
Activated rhodopsin activates a G protein.
correct
incorrect
Light is refracted at the lens to focus on the retina.
correct
incorrect
*
not completed
.
When light activates rhodopsin, the result at the vertebrate rod or cone outer membrane is
depolarization.
correct
incorrect
hyperpolarization.
correct
incorrect
inhibition.
correct
incorrect
an action potential.
correct
incorrect
*
not completed
.
Which statement best describes the regeneration of rhodopsin in vertebrate rods?
Photochemical regeneration of rhodopsin is instantaneous.
correct
incorrect
Photochemical regeneration of rhodopsin is slow.
correct
incorrect
Enzymatic regeneration is slow.
correct
incorrect
Enzymatic regeneration is based on dark adaptation.
correct
incorrect
*
not completed
.
Which type of cells in the retina have their most prominent action in the lateral pathway, as opposed to the straight-through pathway?
Bipolar cells
correct
incorrect
Horizontal cells
correct
incorrect
Ganglion cells
correct
incorrect
Cone cells
correct
incorrect
*
not completed
.
In the visual projection pathway of mammals, the geniculostriate pathway projects
from one eye to the primary visual cortex.
correct
incorrect
to the lateral geniculate nucleus within the primary visual cortex.
correct
incorrect
to the primary visual cortex and then to the lateral geniculate nucleus.
correct
incorrect
to the lateral geniculate nucleus and then to the primary visual cortex.
correct
incorrect
*
not completed
.
Based on spectral sensitivities of human retinal cones, what types of cones do we have?
Blue cones, green cones, and red cones
correct
incorrect
Yellow cones, green cones, and red cones
correct
incorrect
Ultraviolet cones, green cones, and red cones
correct
incorrect
Yellow cones, green cones, and violet cones
correct
incorrect
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