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Chapter 12

46 Questions  I  By Failatlife
CHAPTER 12
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1.  About 90% of neurons in the nervous system are          neurons
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2.  The autonomic nervous system is also called the
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3.                division carries signals to the smooth muscle in the large intestine.
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4.  Nerve fibers refers to
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5.  Some            neurons are specialized to detect stimuli, whereas       neurons send signals to the effectors of the nervous system.
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6.        form myelin in the spinal cord
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7.  Nerves are         of the nervous system
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8.  Most metabolic and regulatory functions in a neuron happen at the
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9.             neurons are the most common type of neurons
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10.              are the primary site for receiving signals from other neurons
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11.              are examples of effectors in the nervous system.
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12.  The myelin sheath is formed by
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13.  Opening of sodium gates typically leads to
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14.  The            division tends to prepare the body for action.
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15.  Conduction speed of a nerve fiber would be fastest in a
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16.  Most of the myelin sheath is composed of
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17.  Local potentials are         , meaning they vary in magnitude according to the strength of the stimulus
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18.               has the greatest influence on the resting membrane potential
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19.  Most local potentials happen at the
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20.  During hyperpolarization ( or afterpotential)
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21.  When the voltage of a plasma membrane shifts from +35mV towards 0 mV, we say the cell is
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22.  While the membrane is depolarizing its
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23.  Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?
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24.  An inhibitory local potential
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25.  In order for a peripheral nerve fiber to regenerate it must have
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26.  During the absolute refractory period
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27.  Local potentials are         , whereas action potential are       .
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28.  A cholinergic synapse employs        as its neurotransmitter
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29.  A traveling wave of excitation is what we know as
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30.  All of the following are typical characteristics of neurotransmitters except
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31.  The best type of neural pool for producing a prolonged output is
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32.  Even though all action potentials are the same, the brain can differentiate a variety of stimuli by source and intensity. The mechanism by which the nervous system converts these action potentials into meaningful information is called neural
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33.  All of these contribute to the cessation of the signal in a synaptic transmission except
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34.  Openings of             gates produces an        .
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35.  What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
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36.  Some anitdepressant drugs act by inhibiting monoamine oxidase (MAO), which iss an enzyme
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37.  Accumulation of Ca2+ in the synaptic knob is called         , and probably plays an important role in
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38.           excites skeletal muscle and inhibits cardiac muscle
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39.  Presynaptic inhibition is sthe opposite of
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40.  Which of these happens first in an adrenergic synaptic transmission
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41.  Parkinson disease is a progressive loss of motor  functino due to the degeneration of specific neurons. These neurons secrete an inhibitory neurotransmitter that prevents excessive activity in motor centers of the brain. This neurotransmitter is
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42.  Which of these is an example of an EPSP in a typical neuron?
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43.  Which of these happens first in an cholinergic synaptic transmission
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44.  A neuron can receive thousands of EPSP's from different neurons, and responds by triggering or not triggering an action potential. This addition and response to the net effect of postsynaptic potentials is called
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45.            Binds to ligand-regulated gates, and is the most common inhibitory neurotransmitter in the brain
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46.  Inhibitory postsynaptic potentials (IPSPs) are associated with depolarization of the cell membrane
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