Fundamentals Of The Nervous System And Nervous Tissue

98 Questions  I  By Shakyrag on April 8, 2010
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.  Substance with low electrical resistance?
A.
B.
C.
D.
2.  Prevents the neuron from generating an action potential, ensures that each action potential is separate, enforces one-way transmission of nerve impulses?
A.
B.
3.  Brain and spinal cord, integration and command center?
A.
B.
4.  Input travels along one pathway to a specific destination, works in an all or none manner?
A.
B.
5.  Paired spinal and cranial nerves, carries messages to and from the spinal cord and brain?
A.
B.
6.  Dense collections of myelinated fibers?
A.
B.
7.  Armlike extensions from the soma, called tracts in the CNS and nerves in the PNS?
A.
B.
C.
D.
8.  What are the functions of the nervous system?
A.
B.
C.
D.
9.  What are the 2 functional divisions of the PNS?
A.
B.
C.
D.
10.  Remaining nucleus and cytoplasm of a Schwann Cell?
A.
B.
C.
D.
11.  Include dopamine, norepinephrine, epinephrine, serotning, histamine, broadly distributed in the brain, play roles in emotional behaviors and our biological clock?
A.
B.
C.
D.
12.  Transmit impulses from visceral organs to the brain?
A.
B.
13.  Transmit impulses from the CNS to effector organs?
A.
B.
14.  Specialized for the release and reception of neurotransmitters?
A.
B.
C.
15.  Transmits impulses away from the synapse?
A.
B.
16.  Activates the intracellular receptor guanylyl cyclase, is involved in learning and memory?
A.
B.
C.
D.
17.  The potential difference across the membrane of a resting neuron?
A.
B.
C.
D.
18.  Conscious control of skeletal muscles?
A.
B.
19.  Time from the opening of the Na+ activation gates until the closing of inactivation gates?
A.
B.
20.  *Sodium inactivation gates close*K+ gates open*K+ exits the cell, internal negativity of the resting neuron restored
A.
B.
C.
D.
21.  ________________ neurotransmitters cause hyperpolarizations?
A.
B.
22.  Carry impulses away from the CNS?
A.
B.
C.
23.  Transmit impulses toward the CNS?
A.
B.
C.
24.  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.
25.  Both myelinated and unmyelinated fibers are present, myelin sheaths are formed by oligodendrocytes, Nodes of Ranvier are widely spaces, no neurilemma?
A.
B.
C.
D.
26.  Act as natural opiates, reduce pain perception, bind to the same receptors as opiates and morphine, somatostatin, endorphins?
A.
B.
C.
D.
27.  Chemically gated channels?
A.
B.
C.
D.
28.  Carry impulses from skin, skeletal muscles, and joints to the brain?
A.
B.
29.  Short tapering and diffusely branched processes, receptive or input regions of the neuron, electrical signals are conveyed as graded potentials?
A.
B.
C.
D.
30.  The flow of electrical charge between two points?
A.
B.
C.
D.
31.  Include GABA, Glycine, Apartate, Glutamate, Found only in the CNS?
A.
B.
C.
D.
32.  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.
33.  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.
34.  *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.
35.  Cells that surround and wrap neurons?
A.
B.
C.
D.
36.  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.
37.  Found in both the CNS and PNS, provokes pain sensation?
A.
B.
C.
D.
38.  ____________________ neurotransmitters cause depolarizations?
A.
B.
39.  Used to integrate, send, and receive information, changes produced by changes in membrane permeability to ions, alterations of ion concentrations across the membrane?
A.
B.
C.
D.
40.  Substance with high electrical resistance?
A.
B.
C.
D.
41.  A schwann cell surrounds nerve fibers but coiling does not take place, schwann cells partially enclose 15 or more axons?
A.
B.
C.
D.
42.  Mostly soma and unmyelinated fibers?
A.
B.
43.  What are the ways movement occurs along axons?
A.
B.
C.
D.
44.  Input travels along several pathways, pathways are integrated in different CNS systems, one stimulus promotes numerous responses?
A.
B.
45.  The inside of the membrane becomes less negative?
A.
B.
C.
46.  Generate and transmit action potentials, secrete neurotransmitters from the terminals?
A.
B.
C.
D.
47.  Surround fibers of the PNS?
A.
B.
C.
D.
48.  Regulates smooth muscle, cardiac muscle, and glands?
A.
B.
49.  What are the 2 main parts of the Motor Division?
A.
B.
50.  Excitable cells that transmit electrical signals?
A.
B.
C.
D.
51.  Interpretation of sensory input?
A.
B.
C.
52.  Shuttle signals through CNS pathways?
A.
B.
C.
53.  Envelopes an axon in a trough, encloses the axon with its plasma membrane, has concentric layers of membrane that make up the myelin sheath?
A.
B.
C.
D.
54.  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.
55.  Main regulator of cGMP in the brain?
A.
B.
C.
D.
56.  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.
57.  Support and brace neurons, anchor neurons to their nutrient supplies, guide migration of young neurons, control the chemical environment?
A.
B.
C.
D.
58.  Two processes (axon and dendrite)
A.
B.
C.
59.  Response to Stimuli?
A.
B.
C.
60.  Synapses between the axon of one neuron and the soma of another?
A.
B.
C.
D.
61.  *Na+ and K+ channels are closed*Activation Gates - closed*Inactivation Gates - open
A.
B.
C.
D.
62.  Conducts impulses toward the synapse?
A.
B.
63.  Surround neuron cell bodies with ganglia?
A.
B.
C.
D.
64.  What is the correct order for the phases of the Action Potential?
A.
B.
C.
D.
65.  Electrical impulses carried along the length of axons, always the same regardless of stimulus, the underlying functional feature of the nervous system?
A.
B.
C.
D.
66.  Hindrance to charge flow?
A.
B.
C.
D.
67.  *Potassium gates remain open, effux of K+*neuron is insensitive to stimulus and depolarization during this time
A.
B.
C.
D.
68.  The master controlling and communicating system of the body?
A.
B.
C.
D.
69.  The inside of the membrane becomes more negative than the resting potential?
A.
B.
C.
70.  Which division of the PNS contain Sensory and Visceral afferent fibers?
A.
B.
71.  They line the central cavities of the brain and spinal column?
A.
B.
C.
D.
72.  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?
A.
B.
C.
D.
73.  What are the two principal cell types of the nervous system?
A.
B.
C.
D.
74.  Branched cells that wrap CNS nerve fibers?
A.
B.
C.
D.
75.  *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.
76.  The larger the diameter, the faster the ______?
A.
B.
C.
D.
77.  Most abundant versatile and highly branched glial cells, they cling to neurons and their synaptic endings, and cover capillaries?
A.
B.
C.
D.
78.  Phagocytes that monitor the health of neurons?
A.
B.
C.
D.
79.  Voltage-gated channels?
A.
B.
C.
D.
80.  Measure of potential energy generated by separated charge?
A.
B.
C.
D.
81.  Formed by Schwann cells in the PNS?
A.
B.
C.
D.
82.  Synapses between the axon of one neuron and the dendrite of another?
A.
B.
C.
D.
83.  *Na+ permeability increses, membrane potential reverses*Na+ gates are opened, K+ gates are closed*Threshold -55 - -50mV
A.
B.
C.
D.
84.  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.
85.  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.
86.  Ions move quickly across the membrane, movement is along their electrochemical gradients, an electrical current is created, voltage changes across the membrane?
A.
B.
87.  Contain the sympathetic and parasympathetic divisions?
A.
B.
88.  Their plasma membrane function in electrical signaling, cell-to-cell signaling during development?
A.
B.
C.
D.
89.  Passive, or leakage, channels?
A.
B.
C.
D.
90.  Mechanically gated channels?
A.
B.
C.
D.
91.  Voltage measured between two points?
A.
B.
C.
D.
92.  Monitoring stimuli?
A.
B.
C.
93.  Gaps in the myelin sheath between adjacent Schwann cells, sites where axon collaterals can emerge?
A.
B.
C.
D.
94.  A junction that mediates information transfer from one neuron to another neuron or to an effector cell?
A.
B.
C.
D.
95.  Three or more processes?
A.
B.
C.
96.  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.
97.  The membrane retunrs to its resting membrane potential?
A.
B.
C.
98.  Single, short process?
A.
B.
C.
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