PNB 3251 Final UPDATED Exam Questions and CORRECT Answers
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Course
PNB 3251
Institution
PNB 3251
PNB 3251 Final UPDATED Exam
Questions and CORRECT Answers
The map of olfactory responses in the olfactory bulb is considered evidence of a ________
code.
labeled line
sparse
spatial
somatotopic - CORRECT ANSWER- Sparse
Which of these is a type of taste bud papilla
PNB 3251 Final UPDATED Exam
Questions and CORRECT Answers
The map of olfactory responses in the olfactory bulb is considered evidence of a ________
code.
labeled line
sparse
spatial
somatotopic - CORRECT ANSWER- ✔✔Sparse
Which of these is a type of taste bud papillae
Foliate
Vallite
Epiform
Foliform - CORRECT ANSWER- ✔✔Foliate
What most accurately describes the visual maps in the left lateral geniculate nucleus of the
thalamus.
Independent monocular maps of the ipsilateral visual field
Three binocular maps of ipsilateral visual fields
Six representations of the right visual field
Independent monocular maps of the ipsilateral visual field
Two complete monocular maps of the visual field - CORRECT ANSWER- ✔✔Six
representations of the right visual field
If cGMP were directly injected into a cone photoreceptor in the light the
,photoreceptor would_________________
Depolarize
Hyperpolarize
Not change - CORRECT ANSWER- ✔✔Depolarize
The loss of horizontal cells in the retina would result in a loss of this
type of receptive field
movement RFs of ganglion cells
orientation RFs in V1
Evidence of sensory "bleed through" in phantom limb comes from the
following observation
Gabaergic interneurons induce plasticity.
mirror box therapy works to aleviate pain in the phantom.
endogenous opiates are released in the periaqueductal grey and in the spinal cord.
Stimulation of the face can lead to sensation in the phantom. - CORRECT ANSWER-
✔✔Stimulation of the face can lead to sensation in the phantom.
What opsin type is lost in Deuteranopia color blindness?
S and M opsin
M opsin
L opsin
,S opsin - CORRECT ANSWER- ✔✔M opsin
The hebbian theory of synaptic plasticity predicts which of the following
- Desynchronized inputs will cooperate and strengthen.
- Strong synaptic inputs firing repeatedly will desensitize and weaken.
- A weaker synaptic input that is coactive with stronger inputs will cooperatively strengthen.
- Synchronized inputs will compete for synaptic space with each other. - CORRECT
ANSWER- ✔✔A weaker synaptic input that is coactive with stronger inputs will
cooperatively strengthen.
If glutamate is applied to an isolated ON bipolar cell, then the cell hyperpolarizes because....
- glutamate gated ion channels open.
- Potassium channels open.
- the cell hyperpolarizes after an action potential.
- the cell hyperpolarizes because of Cl‐ currents.
- cGMP gated ion channel close - CORRECT ANSWER- ✔✔cGMP gated ion channel close
Which basic taste stimuli is NOT transduced by Tastant gated ion channels on taste receptor
cells?
- Spicy hot
- Saltiness
- Sweet
- Sour - CORRECT ANSWER- ✔✔Sweet
The _______ layer of the cornea is cut and pealed back in a typical Lasik surgery
- Lens
- Stromal
, - Cilliary
- epidermal - CORRECT ANSWER- ✔✔epidermal
Which is not a way that action potentials code for properties of a sensory stimulus
- Differences in polarity
- Differences in temporal pattern
- differences in spatial pattern - CORRECT ANSWER- ✔✔Differences in polarity
In mutants with the Tlr3 gene missing perception to what tastes would
be lost?
- Umami
- Sweet and Umami
- Salt and Sweet
- Sweet - CORRECT ANSWER- ✔✔Sweet and umami
What is the ion channel responsible for mechano‐sensation in Merkel
disc sensory endings? S
The temporal stream of visual processing processes what type of
information?
- Relative speed
- Space and movement
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