Differences - MYELINATED VS UNMYELINATED NERVES

Differences - MYELINATED VS UNMYELINATED NERVES

1. DIFFERENCES


D R N I L E S H N K A T E , P R O F E S S O R , P H Y S I O L O G Y ,/ D I F F E R E N C E S

Page 6
Difference Between
Myelinated & Unmyelinated Nerves.

Myelinated

Unmyelinated Nerves.
1
Axons – Larger
Diameter
Axons – Smaller
Diameter
2
Axon – Surrounded
by concentric
layers of Schwann
cell plasma
membrane
Axon – Surrounded by
cytoplasm of Schwann
cell.
3
Salutatory
conduction -
present
Salutatory conduction
- absent
4
Density of voltage
gated Na channels -
more

Density of voltage
gated Na channels –
Less.

5
Energy
consumption - less
Energy consumption
– less
6
Example – all
Preganglionic
fibres in ANS, in
PNS fibres more
than 1 μm in
diameter
Example – all
Preganglionic fibres
in ANS, in PNS fibres
less than 1 μm in
diameter