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8 Cards in this Set

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"Nervous System"

Purpose?
-Uses electrochemical signals to communicate w/ body
-Rapid response (short lived)
Neuron Structure:
Parts:
Dendrites, soma=cell body, nucleus,
Axon Hillock
Axon-{ Myelin sheath, Nodes of Ranvier }
Axon Terminal
Effector{synaptic knobs, synaptic cleft}
Functions of Dendrties?
Receive info
-direct extensions of cytoplasm
- generally multiple
-provide an INCREASED Surface
Area, the dendritic zone, to allow
for synaptic interaction.
Function of Soma?
intergration of info
Function of AXON?
Propogate action potential (AP)
Function of MYELIN SHEATH
insulator that allows FASTER transmition of AP (action potential)'s called
SALTABILTY CONDUCTION
= AP jumps from node to node!!
GLIAL CELLS
1) Astrocytes

2) Obligodendrocytes
(glial cells)

1. ASTROCYTES=
Form blood brain barriers
-involved in K