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How are nerve cells ensheathed with myelin in the CNS and the PNS?
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How are nerve cells ensheathed in the cns?
The nerve cells are ensheathed in the cns by myelin which is a dielectric material. The myelin layer extends only upto the axon of a neuron. It is essential for the proper functioning of the nervous system.
What is the insulating layer wrapped around nerve cells that increases the speed of nerve impulse transmission?
The myelin sheath. Due to its insulating properties, the myelin sheath prevents the movement of ions in nerve cells. Therefore nervous impulses will jump between the gaps in the myelin sheath (called the Nodes of Ranvier). This is a lot quicker than the conduction in non-myelinated nerve fibres which occurs by the movement of ions across each of the nerve cell membranes.
Specialized supporting cells in the CNS?
The neuroglia ("nerve glue"), or glial cells, which in the CNS include Astrocytes, Ependymal cells, Microglia, and Oligodendrocytes.
What effect will the destruction of myelin have on the signalling capability of a neuron?
I think that with the destruction of myelin (produced by Oligodendrites in the CNS or the Schwann cells in the PNS that are glial cells that speed up the signal), the signal will be slower or even lost.
What are specialized coverings of the axon?
Myelin covers the axon to protect it and help messages travel faster. Two types of cells produce myelin, the oligodendrocytes in the CNS and Schwann cells in the PNS.
How are nerve cells ensheathed in the cns?
The nerve cells are ensheathed in the cns by myelin which is a dielectric material. The myelin layer extends only upto the axon of a neuron. It is essential for the proper functioning of the nervous system.
Which type of glial cells produces the myelin sheaths that insulate axons or nerve fibers in the central nervous system (CNS)?
myelin sheath
What type of cells produce the myelin sheath in the central nervous system?
Oligodendrocytes and Schwann cells both produce myelin. Oligodendrocytes produce myelin in the CNS, whereas Schwann cells produce myelin in the PNS. CNS refers to central nervous system PNS refers to peripheral nervous system
What is the insulating layer wrapped around nerve cells that increases the speed of nerve impulse transmission?
The myelin sheath. Due to its insulating properties, the myelin sheath prevents the movement of ions in nerve cells. Therefore nervous impulses will jump between the gaps in the myelin sheath (called the Nodes of Ranvier). This is a lot quicker than the conduction in non-myelinated nerve fibres which occurs by the movement of ions across each of the nerve cell membranes.
Where are association nerve cells located?
in your chast
Specialized supporting cells in the CNS?
The neuroglia ("nerve glue"), or glial cells, which in the CNS include Astrocytes, Ependymal cells, Microglia, and Oligodendrocytes.
What makes myelin in the CNS and PNS?
CNS: oligodendrocytes make the myelin, they cooperate in the formation of a myelin sheath along the axon, this is the process of myelination. Each oligodendrocyte produces segments of several axons.PNS: schwann cells make the myelin, each schwann cell can myelinate one segment of a single axon and they work together ot form the myelin sheath.
What is the purpose of myelin sheath?
This is a process that occurs in the CNS and PNS with axons. In the CNS oligodendrocytes surround the axons and in PNS schwann cells surround the axons. the myelin sheath will increase the speed of nervous conduction along the axon.
What effect will the destruction of myelin have on the signalling capability of a neuron?
I think that with the destruction of myelin (produced by Oligodendrites in the CNS or the Schwann cells in the PNS that are glial cells that speed up the signal), the signal will be slower or even lost.
What tissue is connected and supported by glia cells?
Nerve cells (neurons) of the CNS (i.e. the brain).
What cells make up the mylin sheath?
There are two cells that are involved in the myelin sheath. One type is found in the central nervous system (CNS) and the other is in the peripheral nervous system (PNS).These are the oligodendrocytes (CNS) and Schwann cells (PNS).
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
