astrocytes

Neurotransmitters and Their Types

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A chemical substance present in neuron. Transmits nerve impulse from one to another neuron. Thus also called a mediator for impulse transmission. Transmission occurs through synapse. Discovered first by Otto Loewi in 1921. Was an Austrian scientist who practically came out with this discovery. Criteria for Neurotransmitters Various substances are categorized as neurotransmitters. Following criteria … Read more

Neuroglia: Introduction, Classification and Functions

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The supporting cells of the nervous system that are non-excitable are called neuroglia or simply glia (glia=glue). They do not transmit nerve impulse (action potential) for which they are called non-neural cells or glial cells. They are about 10-15 times greater than the number of neurons. During infection, mostly they show or play an important … Read more