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What is a schwann cell?
A schwann cell are supporting cells of the peripheral nervous system, they wrap themselves around nerve axons.
Which best describes the components of a nerve?
axons, blood vessels, connective tissue, Schwann cell.
Which bestdescribes thecomponents ofa nerve?
axons, blood vessels, connective tissue, Schwann cell.
Funtion of the nucleus of a schwann cell?
When the peripheral nervous system develops, Schwann cells line up along unmyelinated axons at regular intervals that eventually become the nodes of Ranvier (important for saltatory nerve condution). The ensheathing process takes place as Schwann cells wrap around the axon many times over, creating concentric layers whose cytoplasm progressively condenses. Contact with the axons also activates myelin genes leading to the expression of myelin glycoproteins and lipids across the Schwann cell plasma membrane. The sheath therefore consists of plasma membrane, cytosol, lipids, glycoproteins, and the Schwann cell nucleus.*So basically, the schwann cells is a protective membrane that covers the axon. It also produces myelin sheath (the coating of a neuron), which increases the speed of the nerve impulse.
Do all nerve cells have a neurilemma?
The neurilemma is the Schwann cell. This helps with regeneration of cells. The nerve cells in the brain do not have neurilemma and therefore, cannot regenerate.
What is the neurilemma and what is it function?
the plasma membrane surrounding a Schwann cell of a myelinated nerve fiber and separating layers of myelin
Which of the following PNS neuroglia help to form myelin sheaths around larger nerve fibers in the PNS?
Schwann Cell
Is myelination of the nerve fibers in the periphreal nervous system the job of the schwann cell?
Yes, in the CNS it is oligodendrocytes that myelinate axons.
What is the relationship between a neurone and a nerve?
neuron = cell body + dendrites + axons nerve = axon + schwann cells (peripheral nervous system only) equivalent term of nerve in the central nervous system is called tracts neuron is a type of cell nerve is an anatomical term
What structure is responsible for myelination of the nerve fibers?
In the peripheral nervous system the cell that myelinates an axon is called a Schwann cell. In the central nervous system myelination is carried out by oligodendrocytes.
Is the schwann cell a plant cell?
No--a schwann cell is a type of glial cell, a cell that functions to help and support neurons in a nervous system.
The sheath of Schwann is also called what?
Its the Neurilemma.
