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