Human Biology
Human Biology
15th Edition
ISBN: 9781259689796
Author: Sylvia Mader, Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 4, Problem 8A
Summary Introduction

Introduction:
The brain contains various cells like microglial cells, Schwann cells, microglia and astrocytes. The microglial cells are phagocytic and engulf the bacteria. Schwann cells have myelin sheath on the neurons and contain nodes of Ranvier, which help in the conduction of the impulses by the movement of the ions across these channels. Astrocytes are connected to the neurons and release a chemical called as glial cell-derived neurotrophic factors (GDNF). Oligodendrocytes are neurons with a myelin sheath present in the brain.

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