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Nervous Tissue II_Test

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Question
Answer
Which type of channel is responsible for establishing the resting membrane potential?   Passive channels  
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Which type of channel is responsible for establishing synaptic potentials?   Chemically gated channels  
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An excitatory postsynaptic potential (EPSP) is produced when the movement of ions makes the inside of the cell more __________.   positive  
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Ion channels on a typical excitatory synapse are specific for __________.   cations, such as sodium and potassium  
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An inhibitory postsynaptic potential (IPSP) makes the inside of the cell more   negative  
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Ion channels in a typical inhibitory synapse are specific for which of the following ions?   Chloride  
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An example of a neurotransmitter that works indirectly, by using a second messenger instead of opening ion channels, is:   GABA.  
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Which of the following neurotransmitters only act indirectly?   Norepinephrine (NE)  
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Which of the following neurotransmitters can act both directly and indirectly?   Acetylcholine (ACh)  
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When a neurotransmitter acts indirectly, it activates a G protein, which then activates an enzyme that produces a second messenger. What does the second messenger activate?   An intracellular enzyme  
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Which of the following parts of the neuron contains the nucleus and most of the cytoplasm aand organelles   cell body  
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A neurotransmitter shich prevents sodium channels from opening in the receiving (postsynaptic) neuron would be considered   inhibitory  
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Which of the following is a true statement about neurotransmitters   Neurons can release more than one kind of neurotransmitter; calcium is required in order for neurotransmitters to be released; it can be either excitary or inhibitory, depending on the effector that receives it  
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Which of the following would transmit an action potentional at the greatest speed   thick myelinated fiber  
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A neuron which causes the contraction of a muscle or the secretion of a gland is called   a motor neuron  
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An afferent neuron carries an action potentional   from a sensory neuron toward the central nervous system  
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Neurons release neurotransmitters into the   synaptic cleft or synapse  
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