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Post-Test
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1
Which of the following uses a motor protein called dynein to move substances along microtubules in the axons?
A)retrograde transport
B)slow axonal transport
C)axoplasmic flow
D)fast anterograde transport
2
In a nerve, what structure does the axon originate from?
A)the axon hillock
B)the soma
C)the dendrite
D)the neurofibrils
E)the terminal bouton
3
In a neuron, the greatest concentration of neurotransmitter is found in the
A)cell body.
B)collateral branches.
C)terminal arborization.
D)synaptic knobs.
4
The plasma membrane of an axon is called
A)axoplasm.
B)axolemma.
C)axon hillock.
D)axonal synapse.
5
Derived from white blood cells, these cells in the central nervous system are often found at the site of injury of brain tissue.
A)oligodendrocytes
B)Schwann cells
C)astrocytes
D)ependymal cells
E)microglia
6
In a Schwann cell, the neurilemma is
A)the outermost coil of the Schwann cell.
B)the nucleus of the Schwann cell.
C)a thin layer of connective tissue composed of basement membrane and collagen fibers.
D)formed by oligodendrocytes.
7
Nodes of Ranvier are gaps between adjacent
A)neurons.
B)dendrites.
C)oligodendrocytes.
D)Schwann cells.
8
A crushed peripheral nerve can be repaired if which of the following is(are) healthy?
A)cell body and dendrite
B)neurilemma alone
C)dendrites and neurilemma
D)cell body and neurilemma
9
During the depolarization phase of an action potential in a neuron
A)K+ ions move from inside to outside the membrane.
B)Na+ ions move from outside to inside the membrane.
C)the Na/K ATPase pumps Na into the cell.
D)K+ and Na+ ions trade places across the membrane.
E)both K+ and Na+ move from outside to inside the membrane.
10
Which of the following statements is false?
A)A neuron cell membrane is very permeable to K+.
B)Na+ is 40 times as concentrated in the ICF as in the ECF.
C)The Na+/K+ pump removes 3 Na+ from the cell for every 2 K+ it pumps into the cell.
D)The unequal distribution of ions across the cell membrane produces the membrane potential.
11
A nerve signal would proceed most commonly in which order?
A)soma > dendrite > axon > synapse
B)dendrite > soma > axon > synapse
C)dendrite > synapse > soma > axon
D)dendrite > soma > synapse > axon
E)axon > soma > dendrite > synapse
12
When does hyperpolarization occur?
A)immediately following threshold
B)just prior to depolarization
C)at the same time as a membrane repolarizes
D)immediately following the action potential
13
A substance which stimulates a postsynaptic neuron to adjust its sensitivity would be a
A)neurotransmitter.
B)peptide.
C)neuromodulator.
D)nerve growth factor.
E)neural integration factor.
14
Neuropeptides are
A)inhibitory neurotransmitters.
B)substances that modify the actions of neurotransmitters.
C)a type of catecholamine such as epinephrine.
D)excitatory neurotransmitters.
15
A neurotransmitter related to mood is
A)serotonin.
B)gamma-aminobutyric acid.
C)glycine.
D)glutamic acid.
E)acetylcholine.
16
Which of the following neurotransmitters binds to a receptor associated with a G protein rather than one associated with an ion gate?
A)monoamines
B)acetylcholine
C)glutamate
D)aspartate
E)GABA
17
What type of neural coding is involved when a quiet sound induces the stimulation of low threshold neurons which in turn induce the stimulation of high threshold fibers?
A)quantitative
B)tetanic
C)posttetanic
D)facilitation
E)recruitment
18
Tetanic stimulation combined with glutamate-NMDA receptors binding results in
A)synaptic plasticity.
B)facilitation.
C)long-term potentiation.
D)pre-synaptic inhibition.
E)long-term convergence.
19
A degeneration of dopamine-producing neurons in the substantia nigra results in
A)senility.
B)dementia.
C)Parkinson disease.
D)Alzheimer disease.
E)Huntington disease.
20
The process of adding the effects of many postsynaptic potentials is
A)summation.
B)neural integration.
C)discharging.
D)neuromodulation.







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