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)
Loading flashcards...
1
Q

Nissl substance

A

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

2
Q

Bouton

A

The part of the axon that participates in the synapse

3
Q

Gray’s type 1

A

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

4
Q

Gray’s type 2

A

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

5
Q

Fusiform

A

Spindle shape: wide middle with tapered ends.

6
Q

Cortex

A

Outer layer of gray matter that covers the cerebrum

7
Q

GABA

A

Gamma amino butyric acid

8
Q

Medium spiny cell neurons

A

Inhibitory projection neurons unique to the striatum.

9
Q

Purkinje cells

A

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

10
Q

Spiny stellate cells

A

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
Q

Pyramidal cells

A

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

12
Q

Dopaminergic neurons of the substantia negra

A

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

13
Q

Neuroglia means…

A

Nerve glue

14
Q

Myelin

A

Long sheet of oligodendrocyte plasma spirally wrapped around an axon

15
Q

Saltatory conduction

A

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

16
Q

Schwann cells

A

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

17
Q

Protein zero

A

Major structural protein of PNS myelin

18
Q

Spatial buffering

A

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

19
Q

Astrogliosis

A

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

20
Q

Microglia

A

Macrophages of CNS