Examples of freewheeling in a Sentence. 1  She led a freewheeling life in the city. 2  James Bond has long been the model of the freewheeling hero who encounters danger and excitement in every corner of the globe.
Myelin Function. By Sally Robertson, BSc. The myelin sheath is a protective covering that surrounds fibres called axons, the long thin projections that extend from the main body of a nerve cell or neuron. This sheath is composed of protein and lipids.he main function of myelin is to protect and insulate these axons and enhance their transmission of electrical impulses. If myelin is damaged, the transmission of these impulses is slowed down, which is seen in severe neurological conditions such as multiple sclerosis.
The main purpose of myelin is to cover neuron cells so that it can conduct action potential more quickly. If you examine a myelinated neural axon within peripheral nervous system, you will see Schwann cells that cover the cell's axon with myelin sheaths.In between the myelin sheaths are what is called Nodes of Ranvier.So if you follow propagation of an action potential you will see that it starts with the addition of charges through the dendrites into the soma (cell body) and into the axonal hillock.he function of the myelin sheath is to speed up the impulses as  they propagate along the myelinated fibers. This keeps the  electrical current from leaving the axon.