Ch 3 Cellular Components Of Nervous Tissue Flashcards
Nissl substance
Stacks of rough ER interspersed with poly ribosomes in neuron perikaryons.
Bouton
The part of the axon that participates in the synapse
Gray’s type 1
Synapses that are asymmetric with variably shaped vesicles. Tend to be excitatory.
Gray’s type 2
Symmetric synapses with clear round vesicles. Tend to be inhibitory.
Fusiform
Spindle shape: wide middle with tapered ends.
Cortex
Outer layer of gray matter that covers the cerebrum
GABA
Gamma amino butyric acid
Medium spiny cell neurons
Inhibitory projection neurons unique to the striatum.
Purkinje cells
Inhibitory projection neurons arranged in a single row throughout the cerebellar cortex between the outer layer and the granular layer.
Spiny stellate cells
Excitatory local circuit neurons with many dendrites but without an elaborate apical dendrite. Hi fi vertical links of information in a given cortical area.
Pyramidal cells
Excitatory projection neurons that carry all cortical output. The neocortex finely tunes their output.
Dopaminergic neurons of the substantia negra
Neuromodulatory neurons with a pigment. Axons project into the cerebral cortex and basal ganglia.
Neuroglia means…
Nerve glue
Myelin
Long sheet of oligodendrocyte plasma spirally wrapped around an axon
Saltatory conduction
The leaping of action potential from node to node allows axons of small diameter to conduct rapidly.
