Histo lec Nervous Flashcards
Development (4)
o Trophoblast
o Ectoderm
o Endoderm
o Mesoderm
Functional unit of nervous system
neuron
Neuron components (6)
o Cell Body - Nucleus, Nissl bodies
o Dendrites
o Axon
o Axon hillock
o Telodendria
o Synaptic knobs
Nerve impulse (3)
o Action potential
o Wave of depolarization
o Promotes discharge of Neurotransmitter
Synaptic communication (3)
o Presynaptic axon terminal
o Synaptic cleft
o Postsynaptic cell membrane
Glial cells (2)
CNS and PNS
Glial cells in CNS (4)
o Oligodendrocytes
o Astrocyte
o Ependymal cells
o Microglia
Glial cells in CNS
insulation for axons
Oligodendrocytes
Glial cells in CNS
o Immune cells
o Macrophage of the CNS
Microglia
Glial cells in CNS
o Blood brain barrier
o GFAP - Glial fibrillary acid protein
o 2 types
_________
_________
Astrocyte
Fibrous - White matter
Protoplasmic - Gray matter
Glial cells in CNS
o Lining of ventricles and canals
o Cilia
o Microvilli
Ependymal cells
Glial cells in the PNS (2)
Schwann cells
Satellite cells
Glial cells in the PNS
o Counterpart to Oligodendrocytes in CNS
o Neurolemmocytes
o Insulation for Axons
Schwann cells
Glial cells in the PNS
Support and nutrition
Satellite cells
Components of CNS (3)
o Cerebrum
o Cerebellum
o Spinal Cord
Neuronal cells bodies and dendrites
Gray matter
Component of CNS
Gray matter - Inside
White matter - Outside
Spinal Cord
Components of CNS
Gray matter - Outside
White matter - Inside
o Cerebrum
o Cerebellum
Axons w/ myelin sheaths
White matter
Spinal cord Composed of (2)
Posterior
Anterior
Spinal cord Posterior (2)
Sensory neurons
Dorsal roots
Spinal cord Anterior (2)
Motor neurons
Ventral roots
PNS ( 3)
o nerves
o ganglia
o Nerve endings
