Short note about Axon Of Neuron

1. Protoplasmic extension
2. That carries impulses out of a
cell body of a neuron is axon
3. It starts in a conical structure
called axon hillock
4. Generally it is longer than
dendrites
5. It has a uniform diameter/
cylindrical
6. It wrapped with myelin sheath
in motor neurons which is
7. Discontinuous/interrupted at
certain points
8. Region lacking myelin sheath
are called nodes of Ranvier
9. Region between two nodes is
internode
10. Myelin sheath is lined by
neurilemma/Schwann cell/Schwann
sheath
11. Axon lacks Nissl’s granules
12. Terminal end of axon lacks
myelin
13. And divides into branches/
telodendria
14. Each of the branch is swollen/
has terminal bulbs/synaptic
bulbs/terminal buttons
15. Each terminal bulb/button
contains many mitochondria
16. And several vesicles
17. Vesicles contain aceyline
choline/Nor adrenaline/Dopamine
18. Which is a neurotransmitter/
chemical transmitter
19. Cytoplasmic organelles are
present in it
20. The inner medium of it is
known as axolplasm
21. The lining membrane of it is
known as axolemma

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