Difference between revisions of "Neurotransmitter"
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| − | '''Neurotransmitters''' are [[chemical]]s in the [[nervous system]] that communicate information between [[neuron]]s. Neurotransmitters are released from | + | '''Neurotransmitters''' are [[chemical]]s in the [[nervous system]] that communicate information between [[neuron]]s. Neurotransmitters are released from a [[presynaptic terminal]] of one neuron and cross the [[synaptic cleft]] (the space between neurons) before binding to a [[receptor]] on another neuron. Austrian scientist [[Otto Loewi]] discovered the first neurotransmitter, [[acetylcholine]], in 1921 while experimenting on [[frog]]s. |
== Neurotransmitter Guidelines == | == Neurotransmitter Guidelines == | ||
Revision as of 02:25, October 23, 2008
Neurotransmitters are chemicals in the nervous system that communicate information between neurons. Neurotransmitters are released from a presynaptic terminal of one neuron and cross the synaptic cleft (the space between neurons) before binding to a receptor on another neuron. Austrian scientist Otto Loewi discovered the first neurotransmitter, acetylcholine, in 1921 while experimenting on frogs.
Neurotransmitter Guidelines
To be considered a neurotransmitter, a chemical must meet most or all of the following criteria:
- it must be manufactured within a neuron
- it must be found in a neuron
- it must be released when a neuron is stimulated
- when it is released it must bind to a receptor and cause a biological change
- after release the chemical must become inactive
- when applied manually to post-synaptic membrane the chemical must have the same biological effect that it did when released from a neuron