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