AP PSYCHOLOGY

Detailed explanation-1: -Glial cells are an integral part of the human nervous system. They have various functions that help support and nourish nerve cells, or neurons. Several types of glial cells exist. Glial cells are the “glue” of the nervous system, engaging in many activities to support typical brain function.

Detailed explanation-2: -Node of Ranvier-regions of the axon that lie between the Schwann cells where the plasma membrane of a myelinated axon is close to the extracellular fluid. Neuroglia-cells in the central nervous system that help to support, protect, nourish, and maintain the neurons (Fig. 16.1, p. 590)

Detailed explanation-3: -Glial (Neuroglial) cells do not conduct nerve impulses, but, instead, support, nourish, and protect the neurons. Glial cells are far more numerous than neurons and, unlike neurons, are capable of mitosis.

Detailed explanation-4: -It appears that glial cells called astrocytes-so-called because they are shaped similarly to stars-play an active role in memory and learning. This is according to a new study from the University of California (UC), Riverside.

Detailed explanation-5: -Astrocytes provide nutrients to neurons, maintain their extracellular environment, and provide structural support. Microglia scavenge pathogens and dead cells.