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