3A Nervous Tissue Flashcards
rough ER that are basophilic granular masses
nissl bodies
cytoplasmic organelle that distributes protein throughout the cell
smooth ER
prevent degradation of the neuron
peroxisomes
inclusio. that are energy reserves for neurons
fat droplets
end result of lysosomal activity
lipofuscin granules/lipochrome
melanin granules are found in the cells of?
substantia nigra
locus coeruleus
spinal and sympathetic ganglia
pigment granule that is characteristic of neurons in the globus pallidus
iron
cytoskeleton
neurofibrils
abundant in axon and provide internal support for the cell; 10nm in diameter
intermediate filament/ neurofilament
intracellular transport of organelles and vesicles, provides internal support for the neurons, and strengthens synapses
microtubules/neurotubules
transmit impulses away from the cell body
axon
longest nerve in the human body
sciatic nerve
no nissl granules but has smooth ER, mitochondria and neurofibrils
axon
acts as the site for synapses or neuron communication
terminal bouton
swelling at the end
bouton terminaux
swelling along the course
bouton en passant
perikaryon to axon terminal
anterograde; involves kinesin
axon terminal to perikaryon
retrograde; involves dynein
form thin sleeves around the axon
neurilemmal sheath/ sheaths of schwann
sheath that is highly refractile in fresh specimen and present in larger axons
myelin sheath
myelin sheath is color black when stained using:
osmium tetroxide
gaps between myelinated axons
nodes of ranvier
envelops schwann cells
basal lamina
forms myelin in the PNS
schwann cells
forms myelin in the CNS
oligodendrocytes
transmits impulses towards the cell body
dendrites
acts as the most receptive surface in the neuron
dendrites
has nissl granules, mitochondria, and neurofibrils but no golgi complex
dendrites
type of neuron that exists only during early embryonic development
unipolar
