Nervous Tissue Flashcards
Do neurons divide?
no, neurons do not replenish
lost neuron space fills up with scar tissue
Soma
cell body of neuron
nucleus, nucleolus, mitochondria, ER, etc.
nissl bodies
Rough ER surrounded by ribosomes with lots of protein synthesis taking place
dendrites
branches of neurons - the receiving end
axon
the way the neuron sends the impulse
axon terminal
synaptic end - bulbs (vesicles) filled with neurotransmitters
myelin
insulates axon and speeds up conduction
multipolar neuron
multiple inputs
bipolar neuron
two processes coming off
pseudo-unipolar neuron
peripheral nervous system
primary neurons that carry our sensations
where are pigmented neurons found?
substantia nigra
parkinson’s
anterograde
information from soma to synapse (kinesins)
retrograde
information from synapse to soma (dyneins)
How do viruses take advantage of neurons?
Utilize anterograde and retrograde mechanisms to travel to and from the soma
where do neurons synapse?
other neurons
muscles
glands
astrocytes
(star)
have intermediate filaments that make connections with other neurons and blood vessels
metabolically support neurons
fill in scarring
which glial cells help contribute to BBB?
astrocytes
oligodendrocytes
myelinating
microglial cells
immune cells
ependymal cells
surround fluid filled cavities that contain CSF
produce and maintain CSF
schwann cells
myelinates PNS
satellite cells
support PNS cells
help support metabolically
nodes of ranvier
signal transmits quickly from node to node
multiple sclerosis effects on nervous tissue
affects oligodendrocytes
disease of myelination
osmic acid stain
stains phospholipids
myelin stains black
what is a bundle of neuronal cell bodies called in PNS and CNS
Ganglion in PNS
Nucleus in CNS
What is a bundle of axons called in PNS and CNS
nerve in PNS
Tract in CNS
white matter
myelinated and unmyelinated axons
gray matter
neuronal cell bodies primarily
epineurium
surrounds nerve
perineurium
surrounds fascicles of axons
endoneurium
surrounds individual axons
meninges
connective tissue that surrounds the brain
layers of the meninges
Skull
dura
arachnoid (and arachnoid trabeculae)
pia
