N. System & Tissue Ch. 11, Pt. 1 Flashcards
1
Q
Unmyelinated axons
A
3-4 mph slower
1 Schwann cell may incompletely enclose 15+ unmyelinated axons
2
Q
Myelin sheath in CNS
A
Formed by processes of oligodendrocytes not the whole cells.
Node of Ranvier are present
Thinnest fibers are unmyelinated
3
Q
Oligodendrocytes have have processes that
A
form myelin sheaths around CNS nerve fibers
4
Q
White matter
A
dense collection of myelinated fibers
5
Q
Gray matter
A
mostly neuron cell bodies and unmyelinated fibers
6
Q
Presynaptic neurons
A
deliver message- NT
7
Q
Postsynaptic neurons
A
Responds to stimulus and membrane potential charge changes
