Neurotransmitter and Ion Channels

Pages :

3 pages

Format :

.doc

Published date :

11/26/2007

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Summary :

 
 

Table of Contents Neurotransmitter and Ion Channels  Table of Contents

 
  1. Introduction
  2. Conductance mechanisms underlying neurotransmitter actions
  3. Structure of neurotransmitter receptors
  4. Conclusion
  5. References

Abstract

Classes of neurotransmitters Much of the information transfer between neurons in the CNS occurs via chemical synapses. These synapses use a variety of messengers (neurotransmitters) that are released in a Ca2+-dependent fashion from presynaptic terminals and act on specific protein receptors to produce biochemical and excitability changes in the receiving cell. There are two primary groups of neurotransmitters-low-molecular-weight amines and neuroactive peptides. These agents act on two classes of receptors, ligand-gated ion channels, at which the binding of the transmitter directly opens ion channels in the membrane, and G protein coupled receptors. The activated G protein then acts on ion channels or alters biochemical second-messenger systems. Physiologists classify synaptic transmission according to the speed of transmission (fast or slow) and according to the nature of the response (excitatory or inhibitory).

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About the author :

pencil image Sylas S.  
Level :Advanced Study : Psychology School/University : NYU

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