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Myelin sheath

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12y ago

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Are axons most located and protected within the CNS?

axons


What connective tissue cover myelinated or unmyelinated axons?

Axons are covered by connective tissue called endoneurium. Multiple axons are bundled together within fascicles, which are surrounded by perineurium. Finally, the entire nerve is enveloped by epineurium.


Area of spinal cord that contains nerve fibers surrounded by myelin sheath?

the part of the spinal cord that contains mylinated axons is the White matter portion.


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 is meant when axon is described as myelinated?

Most axons are covered with a protective sheath of myelin, a substance made of fats and protein, which insulates the axon. Myelinated axons conduct neuronal signals faster than do unmyelinated axons.


Why are some axons surrounded by myelin sheaths?

Nerve impulse is an electrical current, which flows across the axons. So most of the neurons are surrounded by myelin sheath. This sheath gives insulation to the axons. Brain can not function without this insulation.


What axons do nerves contain?

Nerves are like trees. The have branches call axons.


What is a group of axons bundled together called?

a nerve is bundled together by neuron fibers. The CELL BODY OF A NERVE or neuron is surrounded by satellite cells.


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 makes up the Tracts of myelinated axons in the CNS?

The tracts of myelinated axons in the central nervous system (CNS) consist of bundles of nerve fibers surrounded by myelin sheaths. These tracts serve as pathways for transmitting electrical impulses between different areas of the CNS, allowing for communication and coordination of functions within the body. The myelin sheath, made up of specialized cells called oligodendrocytes in the CNS, helps to increase the speed and efficiency of nerve impulse transmission along the axons.


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.