Table of Contents
What is Myelin Sheath?; Cells of the Nervous System
The myelin sheath is a layer of cells that wraps around the axons of some of the cells in the nervous system. The myelin sheath helps to speed the transmission of electrical signals along the axon. It also helps to protect the axon from damage.
Structure of Myelin Sheath
A myelin sheath is an electrically insulating layer that surrounds the axon of some nerve cells. It is formed by glial cells and consists of Schwann cells and oligodendrocytes. Myelin sheaths are important for the conduction of nerve impulses. They help to increase the speed of transmission of the nerve impulse and also ensure that the impulse is conducted in a uniform and consistent manner. Myelin sheaths are also important for the insulation of the nerve cells.
Composition of Myelin
The myelin sheath is a membrane that surrounds the axon of some nerve cells. It is composed of lipids and proteins. The myelin sheath helps to speed the transmission of nerve impulses along the axon.
Glial Cell
A glial cell is a type of cell that is found in the central nervous system (CNS) and the peripheral nervous system (PNS). Glial cells provide support and insulation for nerve cells, or neurons. There are several types of glial cells, including astrocytes, oligodendrocytes, and microglia.
Myelination
is a process that results in the formation of a myelin sheath around an axon. The myelin sheath is an electrically insulating layer that helps to speed up the transmission of nerve impulses along the axon. The myelin sheath is formed by Schwann cells, which wrap themselves around the axon.
Myelination begins early in fetal development and continues throughout adolescence. Damage to the myelin sheath can cause a loss of nerve function.
The Function of Myelination
The myelin sheath is a white fatty tissue that surrounds the axon of a neuron. The myelin sheath acts as an insulator, which speeds up the conduction of the nerve impulse along the axon. The myelin sheath is produced by the Schwann cells.
Mechanism of Action
The mechanism of action of a drug is the way in which it produces its pharmacological effects. This can be divided into two categories: pharmacokinetic and pharmacodynamic. Pharmacokinetic effects are the drug’s effects on the body’s absorption, distribution, metabolism and excretion. Pharmacodynamic effects are the drug’s effects on the body’s cells and tissues.
