Fundamentals Of The Nervous System And Nervous Tissue

98 Questions  I  By Shakyrag
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Quiz on the fundamentals of the nervous system and the nervous tissue. This is prep for the next test and practical.

  
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1.  The master controlling and communicating system of the body?
A.
B.
C.
D.
2.  What are the functions of the nervous system?
A.
B.
C.
D.
3.  Monitoring stimuli?
A.
B.
C.
4.  Interpretation of sensory input?
A.
B.
C.
5.  Response to Stimuli?
A.
B.
C.
6.  Brain and spinal cord, integration and command center?
A.
B.
7.  Paired spinal and cranial nerves, carries messages to and from the spinal cord and brain?
A.
B.
8.  What are the 2 functional divisions of the PNS?
A.
B.
C.
D.
9.  Carry impulses from skin, skeletal muscles, and joints to the brain?
A.
B.
10.  Transmit impulses from visceral organs to the brain?
A.
B.
11.  Which division of the PNS contain Sensory and Visceral afferent fibers?
A.
B.
12.  Transmit impulses from the CNS to effector organs?
A.
B.
13.  What are the 2 main parts of the Motor Division?
A.
B.
14.  Conscious control of skeletal muscles?
A.
B.
15.  Regulates smooth muscle, cardiac muscle, and glands?
A.
B.
16.  Contain the sympathetic and parasympathetic divisions?
A.
B.
17.  What are the two principal cell types of the nervous system?
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B.
C.
D.
18.  Excitable cells that transmit electrical signals?
A.
B.
C.
D.
19.  Cells that surround and wrap neurons?
A.
B.
C.
D.
20.  Cells that provide a supportive scaffolding for neurons, segregate and insulate neurons, guide young neurons to the proper connections, promote health and growth?
A.
B.
C.
D.
21.  Most abundant versatile and highly branched glial cells, they cling to neurons and their synaptic endings, and cover capillaries?
A.
B.
C.
D.
22.  Support and brace neurons, anchor neurons to their nutrient supplies, guide migration of young neurons, control the chemical environment?
A.
B.
C.
D.
23.  Phagocytes that monitor the health of neurons?
A.
B.
C.
D.
24.  They line the central cavities of the brain and spinal column?
A.
B.
C.
D.
25.  Branched cells that wrap CNS nerve fibers?
A.
B.
C.
D.
26.  Surround fibers of the PNS?
A.
B.
C.
D.
27.  Surround neuron cell bodies with ganglia?
A.
B.
C.
D.
28.  Their plasma membrane function in electrical signaling, cell-to-cell signaling during development?
A.
B.
C.
D.
29.  Contains the nucleus and a nucleolus, the major biosynthetic center, the focal point for the outgrowth of neuronal processes, has no centrioles, has well developed Nissl bodes, contains an axon hillock?
A.
B.
C.
D.
30.  Armlike extensions from the soma, called tracts in the CNS and nerves in the PNS?
A.
B.
C.
D.
31.  Short tapering and diffusely branched processes, receptive or input regions of the neuron, electrical signals are conveyed as graded potentials?
A.
B.
C.
D.
32.  Slender processes of uniform diameter arising from the hillock, long ones are called nerve fibers, usually there is only one unbranched per neuron?
A.
B.
C.
D.
33.  Generate and transmit action potentials, secrete neurotransmitters from the terminals?
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B.
C.
D.
34.  What are the ways movement occurs along axons?
A.
B.
C.
D.
35.  Whitish, fatty segmented sheath around most long axons, it functions to protect the axon, electrically insulate fibers from one another, and increase the speed of nerve impulse transmission?
A.
B.
C.
D.
36.  Formed by Schwann cells in the PNS?
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B.
C.
D.
37.  Envelopes an axon in a trough, encloses the axon with its plasma membrane, has concentric layers of membrane that make up the myelin sheath?
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B.
C.
D.
38.  Remaining nucleus and cytoplasm of a Schwann Cell?
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B.
C.
D.
39.  Gaps in the myelin sheath between adjacent Schwann cells, sites where axon collaterals can emerge?
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B.
C.
D.
40.  A schwann cell surrounds nerve fibers but coiling does not take place, schwann cells partially enclose 15 or more axons?
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B.
C.
D.
41.  Both myelinated and unmyelinated fibers are present, myelin sheaths are formed by oligodendrocytes, Nodes of Ranvier are widely spaces, no neurilemma?
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B.
C.
D.
42.  Dense collections of myelinated fibers?
A.
B.
43.  Mostly soma and unmyelinated fibers?
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B.
44.  Three or more processes?
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B.
C.
45.  Two processes (axon and dendrite)
A.
B.
C.
46.  Single, short process?
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B.
C.
47.  Transmit impulses toward the CNS?
A.
B.
C.
48.  Carry impulses away from the CNS?
A.
B.
C.
49.  Shuttle signals through CNS pathways?
A.
B.
C.
50.  Electrical impulses carried along the length of axons, always the same regardless of stimulus, the underlying functional feature of the nervous system?
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B.
C.
D.
51.  Measure of potential energy generated by separated charge?
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B.
C.
D.
52.  Voltage measured between two points?
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53.  The flow of electrical charge between two points?
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B.
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D.
54.  Hindrance to charge flow?
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B.
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D.
55.  Substance with high electrical resistance?
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B.
C.
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56.  Substance with low electrical resistance?
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B.
C.
D.
57.  Passive, or leakage, channels?
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B.
C.
D.
58.  Chemically gated channels?
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B.
C.
D.
59.  Voltage-gated channels?
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B.
C.
D.
60.  Mechanically gated channels?
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B.
C.
D.
61.  Na+ - K+ Gated Channel*Closed when a neurotransmitter is not bound to the extracellular receptor*Na+ cannot enter the cell and K+ cannot exit the cell*Open when a neurotransmitter is attached to the receptor*Na+ enters the cell and K+ exits the cell
A.
B.
62.  Na+ Channel*Closed when the intracellular environment is negative*Na+ cannot enter the cell*Open when the intracellular environment is positive*Na+ can enter the cell
A.
B.
63.  Ions move quickly across the membrane, movement is along their electrochemical gradients, an electrical current is created, voltage changes across the membrane?
A.
B.
64.  The potential difference across the membrane of a resting neuron?
A.
B.
C.
D.
65.  Used to integrate, send, and receive information, changes produced by changes in membrane permeability to ions, alterations of ion concentrations across the membrane?
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B.
C.
D.
66.  The inside of the membrane becomes less negative?
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B.
C.
67.  The membrane retunrs to its resting membrane potential?
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B.
C.
68.  The inside of the membrane becomes more negative than the resting potential?
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B.
C.
69.  *Short lives, local changes in membrane potential*Decrease in intensity with distance*Magnitude varies directly with the strength of the stimulus*Sufficiently strong graded potential can initiate action potentials*Voltage changes are decremental*Current is quickly dissipated due to the leaky membrane*Only travel over short distances
A.
B.
70.  *A brief reversal of membrane potential with a total amplitude of 100 mV*Only generated by muscle cells and neurons*They do not decrease in strength over distance*They are the principal means of neural communication*Called nerve impluses in the axon of a neuron
A.
B.
71.  *Na+ and K+ channels are closed*Activation Gates - closed*Inactivation Gates - open
A.
B.
C.
D.
72.  *Na+ permeability increses, membrane potential reverses*Na+ gates are opened, K+ gates are closed*Threshold -55 - -50mV
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B.
C.
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73.  *Sodium inactivation gates close*K+ gates open*K+ exits the cell, internal negativity of the resting neuron restored
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B.
C.
D.
74.  *Potassium gates remain open, effux of K+*neuron is insensitive to stimulus and depolarization during this time
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B.
C.
D.
75.  What is the correct order for the phases of the Action Potential?
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C.
D.
76.  Time from the opening of the Na+ activation gates until the closing of inactivation gates?
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B.
77.  Prevents the neuron from generating an action potential, ensures that each action potential is separate, enforces one-way transmission of nerve impulses?
A.
B.
78.  Sodium gates are closed, potassium gates are open, repolarization is occurring, the threshold level is elevared allowing strong stimuli to increase the frequency of action potential events?
A.
B.
79.  The larger the diameter, the faster the ______?
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B.
C.
D.
80.  A junction that mediates information transfer from one neuron to another neuron or to an effector cell?
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B.
C.
D.
81.  Conducts impulses toward the synapse?
A.
B.
82.  Transmits impulses away from the synapse?
A.
B.
83.  Synapses between the axon of one neuron and the dendrite of another?
A.
B.
C.
D.
84.  Synapses between the axon of one neuron and the soma of another?
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B.
C.
D.
85.  Less common variety, correspond to gap junctions found in other cell types, important in the CNS for arousal from sleep, mental attention, emotions and memory, ion and water homeostasis?
A.
B.
C.
86.  Specialized for the release and reception of neurotransmitters?
A.
B.
C.
87.  Fluid filled space separating the presynaptic and postsynaptic neurons, prevents nerve impulses from directly passing from one neuron to the next, transmission is a chemical event, and ensures unidirectional communication between neurons?
A.
B.
C.
88.  Released at the neuromuscular junction, synthesized and enclosed in synaptic vesicles, released by all neurons that stimulate skeletal muscle, some neurons in the autonomic nervous system?
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B.
C.
D.
89.  Include dopamine, norepinephrine, epinephrine, serotning, histamine, broadly distributed in the brain, play roles in emotional behaviors and our biological clock?
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B.
C.
D.
90.  Include GABA, Glycine, Apartate, Glutamate, Found only in the CNS?
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B.
C.
D.
91.  Act as natural opiates, reduce pain perception, bind to the same receptors as opiates and morphine, somatostatin, endorphins?
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B.
C.
D.
92.  Found in both the CNS and PNS, provokes pain sensation?
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B.
C.
D.
93.  Activates the intracellular receptor guanylyl cyclase, is involved in learning and memory?
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B.
C.
D.
94.  Main regulator of cGMP in the brain?
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B.
C.
D.
95.  ____________________ neurotransmitters cause depolarizations?
A.
B.
96.  ________________ neurotransmitters cause hyperpolarizations?
A.
B.
97.  Input travels along one pathway to a specific destination, works in an all or none manner?
A.
B.
98.  Input travels along several pathways, pathways are integrated in different CNS systems, one stimulus promotes numerous responses?
A.
B.
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