Nervos tissues Flashcards
Function is to receive and conduct
electrochemical impulses to and from body
parts
Nervous tissues
What are nervous tissues composed of
neurons and nerve support cells
Support cells called _______ insulate, protect, and support neurons
neuroglia
A neuron consists of _____ and ______
dendrites and long axon
neuron cell body
dendrites
neuroglia or support cells that surrounds the neurons
long axons
Neurons transmit information in the form of action potentials, store information, and integrate the evaluate data
Nervous tisues
______ support, protect, and form specialized sheaths around axons
Neuroglia
Located in the brain, spinal cord, and ganglia
Nervous tissues
cells in the peripheral nervous system
Satellite cells
Schwann cells
are precursors to skeletal muscle cells and are responsible for the ability of muscle tissue to regenerate.
Satellite cells
do not have multiple cellular extensions, but instead each cell engulfs a segment of axon and forms a multilayered myelin sheath around it
Schwann cells
Central nervous system
Microglia
Ependymal cells
Oligodendrocytes
Astrocytes
cells that reside within the parenchyma of the nervous system, that share many if not all the properties of macrophages in other tissues, but that in their nonactivated or resting state have a characteristic “ramified” morphology not seen in resident macrophages of other organ systems.
Microglia
are neuroepithelial multiciliated cells lining the spinal cord and cerebral ventricles [1], and are derived from radial glial cells in the embryo between embryonic Day 14 (E14) and E16
Ependymal cells
myelinating cells of the central nervous system (CNS). They are the end product of a cell lineage which has to undergo a complex and precisely timed program of proliferation, migration, differentiation, and myelination to finally produce the insulating sheath of axons.
Oligodendrocytes
a subtype of glial cells that make up the majority of cells in the human central nervous system (CNS). They perform metabolic, structural, homeostatic, and neuroprotective tasks such as clearing excess neurotransmitters, stabilizing and regulating the blood-brain barrier, and promoting synapse formation.
Astrocytes