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first messenger

 - 2 dictionary results

first messenger

 
Use first messenger in a Sentence
–noun Biochemistry.
a hormone that triggers a biochemical reaction at a site removed from its release.

Origin:
1975–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Medical Dictionary

Main Entry: first messenger
Function: noun
: an extracellular substance (as the hormone epinephrine or the neurotransmitter serotonin) that binds to a cell-surfacereceptor and initiates intracellular activity —compare SECOND MESSENGER
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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