The neuron is a small information processor, and dendrites serve as input sites where signals are received from other neurons. The soma has branching extensions known as dendrites. The nucleus of the neuron is located in the soma, or cell body.

Interactive H5P element used from Introduction to Sensation and Perception adapted by Cheryl Olman, licenced under CC-BY 4.0. This illustration shows a prototypical neuron, which is being myelinated. This section briefly describes the structure and function of neurons.

Neurons, on the other hand, serve as interconnected information processors that are essential for all of the tasks of the nervous system. Glial cells provide scaffolding on which the nervous system is built, help neurons line up closely with each other to allow neuronal communication, provide insulation to neurons, transport nutrients and waste products, and mediate immune responses. Glial cells, which outnumber neurons ten to one, are traditionally thought to play a supportive role to neurons, both physically and metabolically. The nervous system is composed of two basic cell types: glial cells (also known as glia) and neurons. Learning how the cells and organs (like the brain) function, help us understand the biological basis behind human psychology. Psychologists striving to understand the human mind may study the nervous system. Explain how drugs act as agonists or antagonists for a given neurotransmitter system.Describe how neurons communicate with each other.By the end of this section, you will be able to:

All or none principle definition