ISIS death toll from MOAB strike in Afghanistan rises to 94 according to local reports. Last Thursday, the United States deployed its largest non-nuclear weapon against an underground ISIS stronghold in Afghanistan.
The myelin sheath is a layer of fat and protein that covers the axon of a neuron, or nerve cell.The axon, which is a long, thin projection, is designed to carry electrical signals from a neuron to other cells.he myelin sheath is a layer of fat and protein that covers the axon of a neuron, or nerve cell.
Myelin is a collection of lipid fats and proteins that sheaths the long extensions of nerve cells (neurons) called axons. Myelin considerably increases the speed that nerve signals (impulses) move down the axons.he myelin sheath is broken at intervals called the nodes of Ranvier which are rich in sodium channels. This makes the nerve impulses move in a stepwise fashion called salutatory conduction. Myelin is composed of about 80% lipid fats and about 20% proteins.