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Is it true that poliomyelitis results from damage to the myelin sheath around axons in the spinal cord?
true
Unipolar neurons have axons structurally divided into peripheral and central processes?
true
In myelinated axons where are the voltage gated sodium channels concentrated?
In myelinated axons, the voltage gated sodium ions are located along the nodes of Ranvier, the exposed places between the myelin segments. The gates here, however, are not particularly more concentrated than on other un-myelinated axons. TRUE
Can oligodendrocytes myelinate several axons?
Yes, oligodendrocytes in the central nervous system can myelinate multiple axons simultaneously. This is in contrast to Schwann cells in the peripheral nervous system, which typically wrap around and myelinate only one axon.
How do the conduction velocities of unmyelinated axons compare to myelinated axons?
Unmyelinated axons have slower conduction velocities compared to myelinated axons. Myelinated axons are able to conduct nerve impulses faster due to the insulation provided by the myelin sheath.
Do axons send or receive signals?
Axons send signals.
What axons do nerves contain?
Nerves are like trees. The have branches call axons.
The axons of the retina culminate in what nerve?
the axons of the retina culminate in the optic nerve which forms a blind spot on the retina
What is another name for Myelinated axons?
In preserved brains, the myelinated axons look white. Therefore, what we call "white matter" is typically made of axons.
Are axons most located and protected within the CNS?
axons
What iscomposed of lipid material and covers axons?
The myelin sheath is composed of lipid material and covers axons.
What moves across axons in the nervous system?
Electrical impulses move across axons in the nervous system.
