Notes in Nervous Tissue

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Published	09/05/2024	Nervous tissue is divided in the {{c1::central (CNS) and peripheral (PNS)}} portions of the nervous system
Published	09/05/2024	Nervous tissue contains {{c1::2::#}} distinct cell(s): {{c1::neurons and glial}} cells
Published	09/05/2024	Structural & functional unit of nervous system is {{c1::neuron}}
Published	09/05/2024	A neuron consists of the {{c1::dendrites, cell body, axon, and nerve endings}}
Published	09/05/2024	All neurons {{c1::terminally differentiated::unspecialized/terminally differentiated/facultative dividers}} and in {{c1::Go::what phase of cell cycle?…
Published	09/05/2024	Multi-polar neuron— {{c1::most common; several dendrites::dendrite #}} {{c1::(e.g.,motor neurons, interneurons)::examples}}
Published	09/05/2024	Bipolar neuron type—{{c1::single dendrite opposite axon::dendrite #}} {{c1::(e.g., receptor neurons of retina)::examples}}
Published	09/05/2024	Unipolar neuron type—{{c1::no dendrites on soma, axon only::dendrite #}}{{c1::(e.g., sensory neurons)::example}}
Published	09/05/2024	Pseudounipolar—{{c1::single dendrite & axon fuse; soma off to one side::dendrite #}}; {{c1::(e.g., dorsal root ganglia)::example}}
Published	09/05/2024	wrt nervous tissue, Supporting cells provide: {{c1::physical support & protection, electrical insulation, metabolic exchange}}
Published	09/05/2024	Categories of nervous tissue and where?:{{c1::neuroglia in CNS, Schwann cells in PNS, supporting cells satellite cells in ganglia}}
Published	09/05/2024	neurilemma—{{c1::plasma membrane surrounding cell}}
Published	09/05/2024	Nissl substance: {{c1::perikarya, rER in soma of neuron}}
Published	09/05/2024	Axonal transport: {{c1::Movement of products down axon}}
Published	09/05/2024	Slow axonal transport: {{c1::cytoskeletal elements (1-5mm/day)::what and how fast?}}
Published	09/05/2024	Fast axonal transport: {{c1::membrane-bound organelles (anterograde 400mm/day, retrograde 300mm/day)::what and how fast?}}
Published	09/05/2024	Anterograde transport {{c1::(from cell body down axon)::define}} uses {{c1::kinesin::what protein?}}
Published	09/05/2024	Retrograde transport {{c1::(from axon → cell body)::define}} uses {{c1::dynein::what protein?}}
Published	09/05/2024	Action potential generation{{c1::1. Resting Potential: Neuron at -70 mV, channels closed.2. Depolarization: Stimulus opens VGNaC, Na⁺ enters.3. Rising…
Published	09/05/2024	Define synapse: {{c1::Specialized junctions between neurons and effector cell }}
Published	09/05/2024	Each synapse {{c1::uni}}directional; response to stimulus either {{c1::excitatory or inhibitory}}
Published	09/05/2024	Entrainment—{{c1::more a pathway is used, easier it is to access}}
Published	09/05/2024	wrt synapses Signaling molecules released from {{c1::pre-synaptic membrane}}
Published	09/05/2024	Terminal bouton: {{c1::end structure of an axon that forms a synapse with another neuron or target cell. Contains mitochondria and synaptic vesicles f…
Published	09/05/2024	2 neurotransmitters in PNS:{{c1::Acetylcholine (ACh), cholinergic: Parasympathetic, relaxationNorepinephrine, adrenergic: Sympathetic, fight or flight…
Published	09/05/2024	endoneurium: {{c1::surrounds Individual axon and Schwann::tissue type and fxn}}. {{c1::PNS::CNS/PNS}}
Published	09/05/2024	Multiple axons organized into {{c1::bundles (fascicles}}) surrounded by {{c1::perineurium}}{{c1::PNS::CNS/PNS}}
Published	09/05/2024	Perineurium: {{c1::Exhibit epithelioid & myoid features; may play role in axon regeneration}}
Published	09/05/2024	PNS has {{c1::afferent &/or efferent::afferent/efferent/both}} fiber(s) (axon(s)) of {{c1::either somatic (voluntary) or autonomic (involuntary) n…
Published	09/05/2024	wrt PNS, what Nn enveloped by Schwann cells? {{c1::all Nn}}
Published	09/05/2024	Myelinated Nn insulated {{c1::by many concentric layers of plasma membrane from many Schwann cells}}
Published	09/05/2024	In non-myelinated Nn, {{c1::several axons lie in channels within Schwann cell, surrounded by single layer of neurilemma from Schwann cell::describe st…
Published	09/05/2024	Nodes of Ranvier: {{c1::Gaps in myelin sheath between Schwann cells}}, {{c1::results in saltatory conduction}}
Published	09/05/2024	wrt ANS, Preganglionic (= presynaptic) neurons have cell bodies in{{c1::gray matter of brain & cord in CNS}}
Published	09/05/2024	Ganglia—{{c1::discrete aggregations of postsynaptic neuron cell bodies located outside the CNS}}
Published	09/05/2024	wrt ANS, postganglionic (= postsynaptic) neurons, have cell bodies located {{c1::in ganglia}}
Published	09/05/2024	Ganglia surrounded by {{c1::satellite cells}}, derived from {{c1::neural crest}}provide {{c1::structural & metabolic support}}
Published	09/05/2024	Sympathetic ganglia located in {{c1::parallel vertebral column}}
Published	09/05/2024	parasympathetic ganglia located {{c1::in or near effector organ}}
Published	09/05/2024	Sympathetic ganglia include {{c1::prevertebral & paravertebral}} ganglia
Status	Last Update	Fields