Flashcards in Ch 3 Cellular Components Of Nervous Tissue Deck (20):
Stacks of rough ER interspersed with poly ribosomes in neuron perikaryons.
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.
Spindle shape: wide middle with tapered ends.
Outer layer of gray matter that covers the cerebrum
Gamma amino butyric acid
Medium spiny cell neurons
Inhibitory projection neurons unique to the striatum.
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.
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.
Long sheet of oligodendrocyte plasma spirally wrapped around an axon
The leaping of action potential from node to node allows axons of small diameter to conduct rapidly.
Principal glia of the PNS. Keep myelinated and non myelinated cells alive.
Major structural protein of PNS myelin
Astrocytes soak up neurotransmitters so they do not interfere with future synaptic activity.
Increase in the number of astrocytes due to neuron injury in the CNS.