AP PSYCHOLOGY

Detailed explanation-1: -Schwann Cells (glial cell of the PNS) surrounds neurons, keeping them alive and covering them with a myelin sheath. They play essential roles in the development, maintenance, function, and regeneration of peripheral nerves.

Detailed explanation-2: -Schwann cells: these cells provide the myelin that covers neurons in the peripheral nervous system. Larger neurons are covered in a myelin sheath. Myelin is high in lipid and serves the same purpose as insulation around electrical wires. Myelinated axons conduct nerve impulses faster.

Detailed explanation-3: -Another important function of astrocytes is the regulation of brain metabolism, which is carried out through the extensions of protoplasmic astrocytes that surround neurons, maintaining a microenvironment suitable for their metabolic functions (Cornell-Bell et al., 1990).

Detailed explanation-4: -Primarily, glial cells provide support and protection to the neurons (nerve cells), maintain homeostasis, cleaning up debris, and forming myelin. They essentially work to care for the neurons and the environment they are in.

Detailed explanation-5: -Glial cells are found in the central nervous system (CNS) and peripheral nervous system (PNS). The important CNS glial cells are astrocytes, microglia, oligodendrocytes, radial glial cells, and ependymal cells. Schwann cells, enteric glial cells, and satellite glial cells are part of the PNS.