Beckers World of the Cell Study Set 1

Biology

Quiz 22 :

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Quiz 22 :

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

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Each of the following contributes to the unidirectional propagation of nerve signals except
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D

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Which point on the graph represents the threshold potential?
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B

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Under times of great stress or shock,which of the following neurotransmitters interferes with the perception of pain?
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D

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While characterizing the activities of several neurons,you find a neuron with the following properties: (1)When stimulated,the neuron fails to release neurotransmitters into the synaptic cleft. (2)Microinjection of calcium ions calcium ions has no effect on the neuron.(In other neurons such microinjection stimulates the t-SNARE and v-SNARE complex interaction that promotes neurotransmitter secretion.) The abnormality in this neuron is most likely associated with the function of
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Based on the graph,how soon could another action potential be easily initiated (at the end of the relative refractory period)after the first stimulus?
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The resting potential of a particular nerve cell is −66 mV.Depolarization of the neuron membrane will shift the membrane potential to
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If myelin was lost from the neuron firing the action potential graphed,the action potential cycle would
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What happens to neurons in the approach known as optogenetics?
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Plasma membrane permeability of which of the following ions is most important in generating the resting membrane potential?
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The parts of the graph indicated between points C and E represent
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Each of the following statements about action potentials is true except
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Which of the following interferes with the reuptake of neurotransmitters?
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Which of the following is a disease specifically caused by an autoimmune response against acetylcholine receptors?
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Generation of an action potential by a neuron may ultimately stimulate
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Which neurotransmitter is not an amino acid derivative?
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An example of a generally inhibitory neurotransmitter is
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Each of the following is a type of glial cells except
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The axon branches of a typical neuron terminate at structures called
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If the membrane represented in the graph was stimulated in the presence of a drug that specifically inhibits sodium channels,the membrane would
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How many neuronal connections are there in the human brain?
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