Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

What features characterize a substance as a neurotransmitter?

Summary Introduction

To review:

The features of a chemical that describes it as a neurotransmitter.


The neurons are specialized cells, which have the ability to receive and transmit the electrical impulses. Neurons get depolarized in the presence of a stimulus and generate an action potential. The neurons conduct action potential in the form of chemical signals or electrical impulses. The chemical signal takes place with the help of neurotransmitters, which are small molecules that conduct information in the form of chemicals.


The brain is protected from the bacterial or viral infection by blood–brain barrier that does not allow the molecules present in blood to diffuse inside the brain. Therefore, the neurotransmitters are produced inside neurons located in the central nervous system. The neurotransmitters are packed inside the synaptic vesicle, and get released only after an action potential is generated. The neurotransmitters are released in the synaptic cleft from where they move toward the dendrites of next neuron...

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