neurons and neuroglia Flashcards
neuron classification based on number, length and mode of branching of neurites
unipolar, bipolar, multipolar
pyramidal cells have what type of neuron and location
golgi type1 neuron
cerebral cortex
structure in nerve cell body that synthesis proteins
nissl substance
related to the formation of dopamine( cytoplasmic organelle)
melanin
The phenomenon that gives impression that nissl substance has disappeared
chromatolysis
replacement gliosis
protoplasmic astrocytes proliferate and fill up space previously occupied by dead neurons due to disease
astrocyte types and locations
fibrous-white matter
protoplasmic- gray matter
astrocytes in PNS corresponds to
satellite cells
glial cells responsible for myelin production
CNS- Oligodendrocytes
PNS- Schwann cells
supports to forms the Blood-Brain Barrier
endothelial cells and Astrocytes
cell body in cns and pns
cns- nuclei
pns- ganglia
produces csf
choroidal epithelial cells- ependymal
transports substances from CSF to hypophyseal-portal system
Tanycytes (ependyma)
cell scavengers
metabolic by-product -the structure has granules
lysosomes
lipofuscin
the volume of cytoplasm within the nerve cell body always far exceeds that found in the neurites. true or false.
FALSE. the volume of cytoplasm within the nerve cell body is often far less than the total volume of cytoplasm in the neurites.
ependymal cells that circulate and absorb CSF
ependymocytes
role in cell transport in nerves
microfilaments, microtubules, and neurofibrils.
nerve fiber type which has the slowest conduction velocity and is sensitive to anesthesia.
c fibers
neurotransmitter with ionic mechanism as IPSP
GABA
neurons which have an elongated cell body and have two neurites extending from each end.
bipolar
the major role of centrioles in mature neuron
maintenance of microtubules
in females, one of the two X chromosomes is compact and sits in the inner surface of the nuclear envelope
Barr body
location of unipolar cells
posterior root ganglion
forms the upper motor neuron in the cerebral cortex
pyramidal cells
a discrete group of nerve cell bodies in the CNS
nucleus
neuromodulators that are located in a system that controls homeostasis
ACh ( muscarinic), serotonin, histamine, adenosine
sharp localized pain, temperature, touch is a function of which fibers
delta fibers