exam 2 part 2 Flashcards
grey matter
composed of neuronal cell bodies, dendrites, axonal terminals
white matter
bundles of axons
multipolar neurons
one axon and two or more dendrites, most motor neurons
bipolar neurons
one axon and one dendrite, sensory neurons, retina, olfactory, inner ear
unipolar neurons
single processes that bifurcates close to the stroma, long process extending peripheral, sensory neurons, dorsal root ganglia
anaxonic neurons
many dendrites but no axon, no action potential, regulate potentials of other neurons, retina
fibrous astrocytes
largest found in white matter, CNS
protoplasmic astrocytes
found in the grey matter, CNS
oligodendrocytes
small dark nucleus, creates myelin, CNS
microglial cells
phagocytosis, smallest, CNS
satellite cells
located in ganglia, PNS
Schawnn cells
produce myelin in the PNS
PNS divisions
sensory (afferent) and motor (efferent)
sensory afferent
sensory nerves, send signals to the CNS
motor efferent
composed of motor neurons, somatic and autonomic
somatic nervous system
voluntary movements
autonomic nervous system
involuntary movement, sympathetic and parasymathetic
sympathetic nervous system
fight/flight
parasympathetic nervous system
rest/digest
lymphocyte lifespan
weeks- years
neutrophil lifespan
6hours- few day
basophil lifespan
2-3 days
rubriblast
large cells, scant, deeply blue cytoplasm, most undifferentiated RBC
prorubricyte
second most undifferentiated RBC
rubricyte
third undifferentiated RBC, acidophilic and basophilic cytoplasm, nucleus is heterochormatic
metarubricyte
near the size of a mature RBC, eccentric nucleus, dense and round, slightly basophilic cytoplasm
reticulocyte
youngest RBC precursor to circulate normally, slightly basophilic cytoplasm, no nucleus
myeloblast
most undifferentiated granulocyte
promyelocyte
second most undifferentiated granulocyte
myelocyte
nucleus round/oval, granules appear
metamyelocyte
nucleus is bean-shaped, small indent
band cell
larger indented nucleus, can be released into circulation (left-shift)
