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substance P

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substance P

–noun
a small peptide released upon stimulation in the nervous system and involved in regulation of the pain threshold.

Origin:
earlier standard preparation P (1931); the initial is unexplained by the substance's discoverers
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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substance P  
n.  A short-chain polypeptide that functions as a neurotransmitter especially in the transmission of pain impulses from peripheral receptors to the central nervous system.

[From p(ain).]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: substance P
Function: noun
: a neuropeptide that consists of 11 amino acid residues, that is widely distributed in the brain, spinal cord, and peripheralnervous system, and that acts across nerve synapses to produce prolonged postsynaptic excitation
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

substance P n.
A short-chain polypeptide that functions as a neurotransmitter especially in the transmission of pain impulses from peripheral receptors to the central nervous system.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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