57) What happens to neurotransmitter molecules after they are released to the synaptic cleft? A) Some of neurotransmitter bind to the receptors on
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57) What happens to neurotransmitter molecules after they are released to the synaptic cleft?
A) Some of neurotransmitter bind to the receptors on the postsynaptic cell membrane
B) Some of neurotransmitter diffuses away from the synaptic cleft
C) Some neurotransmitters is taken up by the presynaptic cell.
D) Some neurotransmitters is degraded by enzymes.
E) all of these
58) A change in a cell's membrane potential from -60 my to -80 my, is referred to as a
?
A) depolarization
B) hyperpolarization
hypopolarization
D) polarization
E) repolarization

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34) Which of the following would not affect our ability to resolve the location of a specific stimulus?
A) lateral inhibition between receptive fields
B) density of receptive fields
?
C) sensory modality of the receptor (stimulus modality )
D) size of the receptive field
[) extent of overlap between receptive fields
35) Lips have the greatest sensory acuity because
?
A) they have the largest second-order neuron.
B) they have the smallest two point discrimination threshold potential.
C) they have the largest two point discrimination threshold potential.
D) they have the largest receptive field.

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26) According to the law of specific nerve energies, a single sensory receptor
A) responds to only one type of stimulus, regardless of the strength of stimulation
B) is coded for by the receptive field activated.
C) responds best to a specific energy modality
D) type detects all the somesthetic sensations
E) type detects all the somatic sensations
27) Neurotransmitters are chemical signal molecules which are released to the synaptic cleft by presynaptic
neurons.
"A) true
B) false
28) Which of the following changes in membrane potential is considered inhibitory?
A) repolarization only
B) both hyperpolarization and depolarization
C) both depolarization and repolarization
D)hyperpolarization only
E) depolarization only
29) Presynaptic inhibition allows an increased release of neurotransmitters.
A) true
B) false

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17) Slow EPSPs are generated by directly binding of neurotransmitters to
resulting in the influx of
sodium ions and efflux of potassium ions.
A) CAMP
B) metabotropic receptor/G-protein linked receptor
C) ionotropic receptor/ channel-linked receptor
D) G-protein
E) adenylate cyclase
18) What type of receptor detects pain?
A) osmoreceptor
B) proprioceptor
C) nocicept
D) mechanoreceptor
E) thermoreceptor
19) The transduction of sound waves into neural impulses occurs in the
A) organ of Corti
B) utricle
C) ossicles
D) eustachian tube
E) semicircular canals
20) A synaptic potential
A) is graded to the strength of a stimulus.
B) can be deploraized or hyperpolarized.
C) is found at a post-synaptic cell.
P
D) can not be summed.
E) all of these except D.
P
21) Which of these cells relay the strongest sound intensity?
A )
22) How does one know if the hand is touched at the spot marked by "B" and not at the spot marked by "A"?
A 21
hand area
in
Hand area
32
somatosomeory
colex
in
B
somatosensory
cortex
A) because "B" has a smaller two-point discrimination threshold.
B) Because the stimulus is located within the receptive field of "B" only.
C) Because the stimulus did not trigger a lateral inhibition at spot "B".
D) Because the stimulus is inhibitory at spot "A"

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2
60) Electrical synapses are characterized by a synaptic cleft.
A) true
B) false
61) Which of the following letters represents a correct illustration of one sensory unit?
AD
land
B
D

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