Ch 3 Cellular Components Of Nervous Tissue Flashcards Preview

Neuroscience > Ch 3 Cellular Components Of Nervous Tissue > Flashcards

Flashcards in Ch 3 Cellular Components Of Nervous Tissue Deck (20):
1

Nissl substance

Stacks of rough ER interspersed with poly ribosomes in neuron perikaryons.

2

Bouton

The part of the axon that participates in the synapse

3

Gray's type 1

Synapses that are asymmetric with variably shaped vesicles. Tend to be excitatory.

4

Gray's type 2

Symmetric synapses with clear round vesicles. Tend to be inhibitory.

5

Fusiform

Spindle shape: wide middle with tapered ends.

6

Cortex

Outer layer of gray matter that covers the cerebrum

7

GABA

Gamma amino butyric acid

8

Medium spiny cell neurons

Inhibitory projection neurons unique to the striatum.

9

Purkinje cells

Inhibitory projection neurons arranged in a single row throughout the cerebellar cortex between the outer layer and the granular layer.

10

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.

11

Pyramidal cells

Excitatory projection neurons that carry all cortical output. The neocortex finely tunes their output.

12

Dopaminergic neurons of the substantia negra

Neuromodulatory neurons with a pigment. Axons project into the cerebral cortex and basal ganglia.

13

Neuroglia means...

Nerve glue

14

Myelin

Long sheet of oligodendrocyte plasma spirally wrapped around an axon

15

Saltatory conduction

The leaping of action potential from node to node allows axons of small diameter to conduct rapidly.

16

Schwann cells

Principal glia of the PNS. Keep myelinated and non myelinated cells alive.

17

Protein zero

Major structural protein of PNS myelin

18

Spatial buffering

Astrocytes soak up neurotransmitters so they do not interfere with future synaptic activity.

19

Astrogliosis

Increase in the number of astrocytes due to neuron injury in the CNS.

20

Microglia

Macrophages of CNS