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Why is the white matter of the spinal cord white?
The white matter of the spinal cord appears white due to the myelin sheaths surrounding the axons of neurons. Myelin is a fatty substance that acts as an insulator, allowing for faster transmission of nerve impulses. The high lipid content of myelin gives the white matter its color.
Is white matter composed of ganglial sheaths?
No, white matter is composed of myelinated axons that carry nerve signals between different parts of the brain and the spinal cord. Ganglial sheaths are part of the peripheral nervous system and surround cell bodies of neurons.
Are axons most located and protected within the CNS?
axons
Which neuroglial cell is responsible for the production of myelin sheaths around axons in the central nervous system?
Oligodendrocyte; processes of the oligodendrocytes form the myelin sheaths around the CNS nerve fibers
Is white matter dense in myelinated axons?
Yes, white matter is dense in myelinated axons. White matter in the brain and spinal cord is primarily composed of nerve fibers that are encased in myelin sheaths, which give it its white color. Myelination helps to speed up the transmission of nerve impulses along these axons.
Do lower motor neurons have their cell bodies in the brain and their axons in the ganglia?
No, lower motor neurons have their cell bodies in the spinal cord or brainstem and their axons extend directly to the muscles they innervate. Ganglia are clusters of cell bodies located outside the central nervous system.
Where are the Axons located in the spinal cord?
On the outer parts
What is the white matter of the spinal cord contain?
axons
Spinal nerve roots which contain only motor neuron axons?
the what? root of a spinal nerve consists of motor neuron axons
Why are spinal nerves mixed nerves?
Spinal nerves are said to be mixes because their posterior roots contain sensory axons and their anterior roots contain motor axons.
What two cells form the insulating sheaths around axons?
Schwann cells and oligodendrocytes
Gray matter in the spinal cord is mostly?
unmyelinated axons.
