AP PSYCHOLOGY

Detailed explanation-1: -Myelin sheath is the insulating envelope of myelin, that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses, formed from the cell membrane of the Schwann cell in the peripheral nervous system and from oligodendroglia cells.

Detailed explanation-2: -Myelinating Schwann cells are radially and longitudinally polarized cells (Salzer 2003; Ozcelik et al. 2010; Pereira et al. 2012). With myelination, Schwann cells organize into distinct membrane domains, each with a unique array of proteins, and a communicating set of cytoplasmic compartments (Fig.

Detailed explanation-3: -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.

Detailed explanation-4: -Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord).

Detailed explanation-5: -Nonmyelinating Schwann cells may surround areas of several unmyelinated axons. A series of Schwann cells encloses an axon along its entire length.