Fundamentals Of The Nervous System And Nervous Tissue

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