Histology Nerve

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Can you name the Important Concepts related to Histology Nerve?

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True or False: the generation of a nerve impulse depends on the summation of excitatory and inhibitory impulses that act on a neuron.
True or False: When the depolarization reaches the axon terminal, voltage-gated Ca channels open in the axon terminal.
What causes the synaptic vesicles to migrate to, and fuse with the presynaptic membrane... causing the release of the Neurotransmitter
True or False: Synapses can only occur from neuron to neuron.
single process for output of electrical signals
Characterized by destruction of myelin from inflammation and subsequent scarring by non-neural cells in brain
synapse that transmit impulses via movement of ions through gap junctions
Outer layer of cytoplasm is in contact with the inner layer of cytoplasm via what?
Large (~1mm) pressure and vibration receptors associated with myelinated axon.
classification of neurons that have one axon and 2 or more dendrites.
presence of this structural component ensures rapid conduction of nerve signals
functional unit of the nervous system
these neurons form a communicating and integrating network b/t sensory and motor neurons
True or False: Schwann Cells surround all neurons in PNS.
Synapse that occurs between an axon and an axon
type of neuron that conveys impulses from CNS to effector cell
which connective tissue layer contributes to the blood-nerve barrier?
which support cell in the PNS helps clean up debris and directs regrowth of PNS axons?
which motor protein is involved in anterograde transport?
True or False: Neurotransmitter is enzymatically degraded in cleft or taken back into cell and degraded in synaptic cleft by mitochondrial enzymes
which micotubule motor protein is used in retrograde transport?
true or false: Unmyelinated Axons have nodes of ranvier.
True or False: Axons have nissl bodies.
contains Golgi, mitochondria, rER (NISSL), sER, ribosomes, lipofuscin granules, cytoskeletal elements and conveys impulse to axon
collections of neuronal cell bodies outside of the CNS
type of neuron that conveys impulses from receptor to the CNS
Which cells make the myelin sheaths for neurons in the PNS?
spread of nerve impulse from node to node
QuestionAnswer
loose connective tissue surrounding each individual nerve fiber
specialized contacts between neurons that allow for transmission of info from one cell to another
Synapse that occurs between an axon and dendrite
release of neurotransmitters that opens channels prompting an influx of Na that causes depolarization is an example of what?
one cell process that divides into axon and dendrite near the cell body
beginning of the axon that is devoid of organelles
~150-μm long, fine touch frequency receptors associated with myelinated axon (dermal papillae).
surround neuron somas (ganglia) and monitor microenvironment
carries material from the axon terminal and the dendrites to the nerve cell body
synapse that transmit impulses thru neurotransmitters
transport of materials from soma to the axon terminal
true or false: actin filaments are involved in axonal transport.
processes for input of electrical signals
dense irregular connective tissue that surrounds a peripheral nerve
small space that separates the pre and post-synaptic cells
true or false: neurons are classified on the basis of the number of axons extending from the cell body.
True or False: Neurons can repair following injury by phagocytosis of damaged portion of axon, regeneration of sheath by Schwann cell, and invasion of new sheath by sprouting of ne
connective tissue surrounding each nerve fascicle
true or false: anterograde and retrograde can occur as slow transport systems.
junction of 2 Schwann Cells
granular appearing ergastoplasm in neuronal cell bodies
Synapse that occurs between an axon and a cell body
What causes the opening of Ligand gated Na Channels to open in the post-synaptic membrane?
carries material from the nerve cell body to the periphery
classification of neurons that have 1 axon and 1 dendrite
release of neurotransmitters that opens anionic channels causing Cl to enter the cell (hyperpolarization)
lipid percentage of myelin
what molecule is required for the use of kinesin in anterograde transport?

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Created Oct 9, 2011ReportNominate
Tags:concept, important, nerve, related