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Sensory Evolution on the ThresholdAdaptations in Secondarily Aquatic Vertebrates$
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J. G. M. Thewissen

Print publication date: 2008

Print ISBN-13: 9780520252783

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520252783.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 20 September 2021

The Chemical Stimulus and Its Detection

The Chemical Stimulus and Its Detection

Chapter:
(p.34) (p.35) 3 The Chemical Stimulus and Its Detection
Source:
Sensory Evolution on the Threshold
Author(s):

Heather L. Eisthen

Kurt Schwenk

Publisher:
University of California Press
DOI:10.1525/california/9780520252783.003.0003

Tetrapods have three chemosensory organs: a gustatory organ, an olfactory organ, and a vomeronasal organ. These chemosensory organs detect sets of chemical stimuli with differing behavioral significance. This chapter discusses the properties of chemical stimuli and identifies which properties are relevant for detection and perception by chemosensory organs. It discusses volatility, solubility, and polarity, and their role in determining which chemosensory organ detects a given stimulus.

Keywords:   tetrapods, chemosensory organs, gustatory organ, olfactory organ, vomeronasal organ, chemical stimuli, volatility, solubility, polarity

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