What structure makes myelin?

What structure makes myelin?

Myelin is formed in the central nervous system (CNS; brain, spinal cord and optic nerve) by glial cells called oligodendrocytes and in the peripheral nervous system (PNS) by glial cells called Schwann cells. In the CNS, axons carry electrical signals from one nerve cell body to another.

What is myelin 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.

What is the structure and function of the myelin sheath?

Myelin sheath is a substance which is found on neurons within the central nervous system (CNS) and the peripheral nervous system (PNS). Myelin sheath is the protective layer that wraps around the axons of neurons to aid in insulating the neurons, and to increase the number of electrical signals being transferred.

What structural classification describes the neuron?

Structural classification of neurons is based upon the number of processes that extend out from the cell body. Three major groups arise from this classification: multipolar, bipolar, and unipolar neurons. Multipolar neurons are defined as having three or more processes that extend out from the cell body.

Is myelin a cell?

The myelin membranes originate from and are a part of the Schwann cells in the peripheral nervous system (PNS) and the oligodendroglial cells in the central nervous system (CNS) (see Chap. 1). Each myelin-generating cell furnishes myelin for only one segment of any given axon.

Is myelin part of the neuron?

The myelin sheath and myelination. Axons are a key component of a neuron, they conduct electrical signals in the form of an action potential from the cell body of the neuron to its axon terminal where it synapses with another neuron.

What is the structure of axon?

An axon is a long, tail-like structure which joins the cell body at a specialized junction called the axon hillock. Many axons are insulated with a fatty substance called myelin. Myelin helps axons to conduct an electrical signal. Neurons generally have one main axon.