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

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