nervous system Flashcards
1
Q
what is Perikaryon
A
- neuron cytoplasm
2
Q
function of the Neurofilaments/Neurotubules:
A
make up the neuron cytoskeleton
3
Q
Neurofibrils
A
- bundles of neurofilaments
4
Q
Nissl bodies
A
- clusters of free ribosomes
5
Q
axoplasm
A
- cytoplasm of the axon
6
Q
Axon hillock
A
- area where the initial segment connects to the cell body
7
Q
Collaterals
A
- branches off the axon
8
Q
axon terminals
A
- ends of axon telodendrias
9
Q
telodendria
A
ends of the axon and collaterals
10
Q
axoplasmic transport
A
the movement of material between the cell body and the axons
11
Q
what 2 subdivisions does the does the PNS split into?
A
- afferent = bring sensory info to CNS
- efferent = bring motor commands out
12
Q
what are the two man branches of the nervous system?
A
- CNS (brain and spinal cord)
- PNS (everything else)
13
Q
what does the afferent split into?
A
- somatic
- visceral
14
Q
what two subdivisions does the efferent division split into?
A
- somatic nervous system (SNS)
- automatic nervous system (ANS)
15
Q
what 2 subdivisions does the ANS split into?
A
- sympathetic nervous system
- parasympathetic nervous system