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Fundamentals Of The Nervous System And Nervous Tissue

98 Questions  I  By Shakyrag
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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Question Excerpt

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1.  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.
2.  Substance with high electrical resistance?
A.
B.
C.
D.
3.  Prevents the neuron from generating an action potential, ensures that each action potential is separate, enforces one-way transmission of nerve impulses?
A.
B.
4.  Carry impulses from skin, skeletal muscles, and joints to the brain?
A.
B.
5.  Chemically gated channels?
A.
B.
C.
D.
6.  *Potassium gates remain open, effux of K+*neuron is insensitive to stimulus and depolarization during this time
A.
B.
C.
D.
7.  The inside of the membrane becomes more negative than the resting potential?
A.
B.
C.
8.  *Na+ and K+ channels are closed*Activation Gates - closed*Inactivation Gates - open
A.
B.
C.
D.
9.  Voltage measured between two points?
A.
B.
C.
D.
10.  What is the correct order for the phases of the Action Potential?
A.
B.
C.
D.
11.  Act as natural opiates, reduce pain perception, bind to the same receptors as opiates and morphine, somatostatin, endorphins?
A.
B.
C.
D.
12.  Short tapering and diffusely branched processes, receptive or input regions of the neuron, electrical signals are conveyed as graded potentials?
A.
B.
C.
D.
13.  Main regulator of cGMP in the brain?
A.
B.
C.
D.
14.  Substance with low electrical resistance?
A.
B.
C.
D.
15.  Phagocytes that monitor the health of neurons?
A.
B.
C.
D.
16.  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.
17.  Gaps in the myelin sheath between adjacent Schwann cells, sites where axon collaterals can emerge?
A.
B.
C.
D.
18.  What are the 2 functional divisions of the PNS?
A.
B.
C.
D.
19.  The membrane retunrs to its resting membrane potential?
A.
B.
C.
20.  Voltage-gated channels?
A.
B.
C.
D.
21.  Include GABA, Glycine, Apartate, Glutamate, Found only in the CNS?
A.
B.
C.
D.
22.  Shuttle signals through CNS pathways?
A.
B.
C.
23.  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.
24.  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.
25.  Their plasma membrane function in electrical signaling, cell-to-cell signaling during development?
A.
B.
C.
D.
26.  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.
27.  Response to Stimuli?
A.
B.
C.
28.  Monitoring stimuli?
A.
B.
C.
29.  Time from the opening of the Na+ activation gates until the closing of inactivation gates?
A.
B.
30.  Paired spinal and cranial nerves, carries messages to and from the spinal cord and brain?
A.
B.
31.  Conscious control of skeletal muscles?
A.
B.
32.  Include dopamine, norepinephrine, epinephrine, serotning, histamine, broadly distributed in the brain, play roles in emotional behaviors and our biological clock?
A.
B.
C.
D.
33.  A junction that mediates information transfer from one neuron to another neuron or to an effector cell?
A.
B.
C.
D.
34.  Hindrance to charge flow?
A.
B.
C.
D.
35.  Which division of the PNS contain Sensory and Visceral afferent fibers?
A.
B.
36.  Branched cells that wrap CNS nerve fibers?
A.
B.
C.
D.
37.  *Na+ permeability increses, membrane potential reverses*Na+ gates are opened, K+ gates are closed*Threshold -55 - -50mV
A.
B.
C.
D.
38.  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.
39.  They line the central cavities of the brain and spinal column?
A.
B.
C.
D.
40.  Carry impulses away from the CNS?
A.
B.
C.
41.  Input travels along several pathways, pathways are integrated in different CNS systems, one stimulus promotes numerous responses?
A.
B.
42.  ________________ neurotransmitters cause hyperpolarizations?
A.
B.
43.  Brain and spinal cord, integration and command center?
A.
B.
44.  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.
45.  Most abundant versatile and highly branched glial cells, they cling to neurons and their synaptic endings, and cover capillaries?
A.
B.
C.
D.
46.  *Sodium inactivation gates close*K+ gates open*K+ exits the cell, internal negativity of the resting neuron restored
A.
B.
C.
D.
47.  Generate and transmit action potentials, secrete neurotransmitters from the terminals?
A.
B.
C.
D.
48.  Two processes (axon and dendrite)
A.
B.
C.
49.  Formed by Schwann cells in the PNS?
A.
B.
C.
D.
50.  Support and brace neurons, anchor neurons to their nutrient supplies, guide migration of young neurons, control the chemical environment?
A.
B.
C.
D.
51.  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.
52.  Surround fibers of the PNS?
A.
B.
C.
D.
53.  Transmit impulses from the CNS to effector organs?
A.
B.
54.  Conducts impulses toward the synapse?
A.
B.
55.  The flow of electrical charge between two points?
A.
B.
C.
D.
56.  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.
57.  Dense collections of myelinated fibers?
A.
B.
58.  Synapses between the axon of one neuron and the dendrite of another?
A.
B.
C.
D.
59.  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.
60.  Ions move quickly across the membrane, movement is along their electrochemical gradients, an electrical current is created, voltage changes across the membrane?
A.
B.
61.  Transmit impulses toward the CNS?
A.
B.
C.
62.  Surround neuron cell bodies with ganglia?
A.
B.
C.
D.
63.  A schwann cell surrounds nerve fibers but coiling does not take place, schwann cells partially enclose 15 or more axons?
A.
B.
C.
D.
64.  What are the 2 main parts of the Motor Division?
A.
B.
65.  What are the two principal cell types of the nervous system?
A.
B.
C.
D.
66.  Interpretation of sensory input?
A.
B.
C.
67.  Transmits impulses away from the synapse?
A.
B.
68.  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.
69.  The inside of the membrane becomes less negative?
A.
B.
C.
70.  Activates the intracellular receptor guanylyl cyclase, is involved in learning and memory?
A.
B.
C.
D.
71.  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.
72.  The larger the diameter, the faster the ______?
A.
B.
C.
D.
73.  *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.
74.  Transmit impulses from visceral organs to the brain?
A.
B.
75.  Excitable cells that transmit electrical signals?
A.
B.
C.
D.
76.  Passive, or leakage, channels?
A.
B.
C.
D.
77.  Input travels along one pathway to a specific destination, works in an all or none manner?
A.
B.
78.  Regulates smooth muscle, cardiac muscle, and glands?
A.
B.
79.  Cells that surround and wrap neurons?
A.
B.
C.
D.
80.  The master controlling and communicating system of the body?
A.
B.
C.
D.
81.  Mechanically gated channels?
A.
B.
C.
D.
82.  Contain the sympathetic and parasympathetic divisions?
A.
B.
83.  ____________________ neurotransmitters cause depolarizations?
A.
B.
84.  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.
85.  Remaining nucleus and cytoplasm of a Schwann Cell?
A.
B.
C.
D.
86.  Single, short process?
A.
B.
C.
87.  *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.
88.  Three or more processes?
A.
B.
C.
89.  Synapses between the axon of one neuron and the soma of another?
A.
B.
C.
D.
90.  The potential difference across the membrane of a resting neuron?
A.
B.
C.
D.
91.  What are the ways movement occurs along axons?
A.
B.
C.
D.
92.  Mostly soma and unmyelinated fibers?
A.
B.
93.  What are the functions of the nervous system?
A.
B.
C.
D.
94.  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.
95.  Specialized for the release and reception of neurotransmitters?
A.
B.
C.
96.  Armlike extensions from the soma, called tracts in the CNS and nerves in the PNS?
A.
B.
C.
D.
97.  Measure of potential energy generated by separated charge?
A.
B.
C.
D.
98.  Found in both the CNS and PNS, provokes pain sensation?
A.
B.
C.
D.
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