How do masses of myelinated nerve fibers appear?

How do masses of myelinated nerve fibers appear?

white. Masses of myelinated nerve fibers appear A. white.

Which of the following neuroglia are not part of the CNS group of answer choices?

Satellite cells are not a neuroglia of the CNS. Satellite cells support cell bodies of neurons in the peripheral nervous system. Astrocytes…

What is myelin quizlet?

Myelin is a lipid rich wrapping of axons by the plasma membrane of non-neuronal, supporting cells.

Which of the following cells is only found in the PNS quizlet?

Satellite cells are found only in the PNS. The visceral motor division is further divided into sympathetic and parasympathetic divisions. Interneurons are only found in the CNS. Oligodendrocytes are found only in the CNS.

Where are myelinated fibers found?

neural retina
The area of myelination clinically is most commonly found continuous with the optic disc, but it may be seen isolated in other parts of the neural retina.

What color is a mass of myelinated fibers?

White matter is found in the deeper tissues of the brain (subcortical). It contains nerve fibers (axons), which are extensions of nerve cells (neurons). Many of these nerve fibers are surrounded by a type of sheath or covering called myelin. Myelin gives the white matter its color.

Which type of neuroglia produces the myelin in the peripheral nervous system?

Schwann cell
Schwann cell, also called neurilemma cell, any of the cells in the peripheral nervous system that produce the myelin sheath around neuronal axons.

What cells form myelin in the central nervous system?

Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath (Figure 1A).

What is the process of myelination?

Myelination is the process by which brain oligodendrocytes produce layers of myelin that wrap around the neuronal axons and act as a layer of insulation for the transmission of electric action potentials down the neuronal axon.

What does myelin do for the nervous system?

Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.

Which cells produce myelin for neurons in the CNS?

CNS myelin is produced by special cells called oligodendrocytes. PNS myelin is produced by Schwann cells. The two types of myelin are chemically different, but they both perform the same function — to promote efficient transmission of a nerve impulse along the axon.

Which cells produce myelin for neurons in the CNS quizlet?

Schwann cells produce myelin for neurons outside the central nervous system. Nodes of Ranvier are indentations between Schwann cells. One of the differences between white matter and gray matter is that gray matter has a myelin sheath.