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Fundamentals Of The Nervous System And Nervous Tissue

98 Questions  I  By Shakyrag
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Brain Quizzes & Trivia
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.  Excitable cells that transmit electrical signals?
A.
B.
C.
D.
2.  A schwann cell surrounds nerve fibers but coiling does not take place, schwann cells partially enclose 15 or more axons?
A.
B.
C.
D.
3.  Main regulator of cGMP in the brain?
A.
B.
C.
D.
4.  Mostly soma and unmyelinated fibers?
A.
B.
5.  Which division of the PNS contain Sensory and Visceral afferent fibers?
A.
B.
6.  Surround fibers of the PNS?
A.
B.
C.
D.
7.  Mechanically gated channels?
A.
B.
C.
D.
8.  Act as natural opiates, reduce pain perception, bind to the same receptors as opiates and morphine, somatostatin, endorphins?
A.
B.
C.
D.
9.  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.
10.  *Sodium inactivation gates close*K+ gates open*K+ exits the cell, internal negativity of the resting neuron restored
A.
B.
C.
D.
11.  *Na+ permeability increses, membrane potential reverses*Na+ gates are opened, K+ gates are closed*Threshold -55 - -50mV
A.
B.
C.
D.
12.  Input travels along one pathway to a specific destination, works in an all or none manner?
A.
B.
13.  Measure of potential energy generated by separated charge?
A.
B.
C.
D.
14.  *Na+ and K+ channels are closed*Activation Gates - closed*Inactivation Gates - open
A.
B.
C.
D.
15.  The inside of the membrane becomes less negative?
A.
B.
C.
16.  Include GABA, Glycine, Apartate, Glutamate, Found only in the CNS?
A.
B.
C.
D.
17.  Single, short process?
A.
B.
C.
18.  Transmit impulses from visceral organs to the brain?
A.
B.
19.  The potential difference across the membrane of a resting neuron?
A.
B.
C.
D.
20.  Remaining nucleus and cytoplasm of a Schwann Cell?
A.
B.
C.
D.
21.  *Potassium gates remain open, effux of K+*neuron is insensitive to stimulus and depolarization during this time
A.
B.
C.
D.
22.  The flow of electrical charge between two points?
A.
B.
C.
D.
23.  Chemically gated channels?
A.
B.
C.
D.
24.  Passive, or leakage, channels?
A.
B.
C.
D.
25.  What are the 2 functional divisions of the PNS?
A.
B.
C.
D.
26.  Three or more processes?
A.
B.
C.
27.  The master controlling and communicating system of the body?
A.
B.
C.
D.
28.  Hindrance to charge flow?
A.
B.
C.
D.
29.  Surround neuron cell bodies with ganglia?
A.
B.
C.
D.
30.  Support and brace neurons, anchor neurons to their nutrient supplies, guide migration of young neurons, control the chemical environment?
A.
B.
C.
D.
31.  Specialized for the release and reception of neurotransmitters?
A.
B.
C.
32.  Their plasma membrane function in electrical signaling, cell-to-cell signaling during development?
A.
B.
C.
D.
33.  Conscious control of skeletal muscles?
A.
B.
34.  Voltage-gated channels?
A.
B.
C.
D.
35.  Phagocytes that monitor the health of neurons?
A.
B.
C.
D.
36.  *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.
37.  ____________________ neurotransmitters cause depolarizations?
A.
B.
38.  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.
39.  Armlike extensions from the soma, called tracts in the CNS and nerves in the PNS?
A.
B.
C.
D.
40.  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.
41.  Cells that surround and wrap neurons?
A.
B.
C.
D.
42.  Generate and transmit action potentials, secrete neurotransmitters from the terminals?
A.
B.
C.
D.
43.  Regulates smooth muscle, cardiac muscle, and glands?
A.
B.
44.  Monitoring stimuli?
A.
B.
C.
45.  Interpretation of sensory input?
A.
B.
C.
46.  Formed by Schwann cells in the PNS?
A.
B.
C.
D.
47.  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.
48.  The membrane retunrs to its resting membrane potential?
A.
B.
C.
49.  Prevents the neuron from generating an action potential, ensures that each action potential is separate, enforces one-way transmission of nerve impulses?
A.
B.
50.  What is the correct order for the phases of the Action Potential?
A.
B.
C.
D.
51.  Gaps in the myelin sheath between adjacent Schwann cells, sites where axon collaterals can emerge?
A.
B.
C.
D.
52.  Voltage measured between two points?
A.
B.
C.
D.
53.  Include dopamine, norepinephrine, epinephrine, serotning, histamine, broadly distributed in the brain, play roles in emotional behaviors and our biological clock?
A.
B.
C.
D.
54.  Synapses between the axon of one neuron and the dendrite of another?
A.
B.
C.
D.
55.  Carry impulses from skin, skeletal muscles, and joints to the brain?
A.
B.
56.  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.
57.  Substance with low electrical resistance?
A.
B.
C.
D.
58.  What are the two principal cell types of the nervous system?
A.
B.
C.
D.
59.  Activates the intracellular receptor guanylyl cyclase, is involved in learning and memory?
A.
B.
C.
D.
60.  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.
61.  Brain and spinal cord, integration and command center?
A.
B.
62.  Input travels along several pathways, pathways are integrated in different CNS systems, one stimulus promotes numerous responses?
A.
B.
63.  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.
64.  ________________ neurotransmitters cause hyperpolarizations?
A.
B.
65.  Branched cells that wrap CNS nerve fibers?
A.
B.
C.
D.
66.  Synapses between the axon of one neuron and the soma of another?
A.
B.
C.
D.
67.  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.
68.  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.
69.  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.
70.  Carry impulses away from the CNS?
A.
B.
C.
71.  Transmits impulses away from the synapse?
A.
B.
72.  A junction that mediates information transfer from one neuron to another neuron or to an effector cell?
A.
B.
C.
D.
73.  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.
74.  Most abundant versatile and highly branched glial cells, they cling to neurons and their synaptic endings, and cover capillaries?
A.
B.
C.
D.
75.  What are the 2 main parts of the Motor Division?
A.
B.
76.  They line the central cavities of the brain and spinal column?
A.
B.
C.
D.
77.  Response to Stimuli?
A.
B.
C.
78.  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.
79.  Transmit impulses from the CNS to effector organs?
A.
B.
80.  Short tapering and diffusely branched processes, receptive or input regions of the neuron, electrical signals are conveyed as graded potentials?
A.
B.
C.
D.
81.  Paired spinal and cranial nerves, carries messages to and from the spinal cord and brain?
A.
B.
82.  The larger the diameter, the faster the ______?
A.
B.
C.
D.
83.  Transmit impulses toward the CNS?
A.
B.
C.
84.  *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.
85.  What are the functions of the nervous system?
A.
B.
C.
D.
86.  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.
87.  Shuttle signals through CNS pathways?
A.
B.
C.
88.  Substance with high electrical resistance?
A.
B.
C.
D.
89.  Contain the sympathetic and parasympathetic divisions?
A.
B.
90.  Conducts impulses toward the synapse?
A.
B.
91.  The inside of the membrane becomes more negative than the resting potential?
A.
B.
C.
92.  Two processes (axon and dendrite)
A.
B.
C.
93.  What are the ways movement occurs along axons?
A.
B.
C.
D.
94.  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.
95.  Found in both the CNS and PNS, provokes pain sensation?
A.
B.
C.
D.
96.  Dense collections of myelinated fibers?
A.
B.
97.  Time from the opening of the Na+ activation gates until the closing of inactivation gates?
A.
B.
98.  Ions move quickly across the membrane, movement is along their electrochemical gradients, an electrical current is created, voltage changes across the membrane?
A.
B.
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