Chemosensory pathways in the capitate tentacles of the hydroid Cladonema

The introduction of an extract of Artemia into the sea water bathing tentacles from the hydroid Cladonema triggers a burst of electrical activity that can be recorded intracellularly from cnidocytes in the capitate tentacles. These bursts, which are composed of a variety of events, including action...

Full description

Saved in:
Bibliographic Details
Published in:Invertebrate neuroscience 2006-03, Vol.6 (1), p.23-32
Main Authors: Price, Rebecca B, Anderson, Peter A V
Format: Article
Language:English
Subjects:
Animals
Artemia
Chemoreceptor Cells - physiology
Cnidaria - physiology
Evoked Potentials - physiology
Neural Pathways - physiology
Neurons - physiology
Seawater
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The introduction of an extract of Artemia into the sea water bathing tentacles from the hydroid Cladonema triggers a burst of electrical activity that can be recorded intracellularly from cnidocytes in the capitate tentacles. These bursts, which are composed of a variety of events, including action potentials and EPSPs, are Ca2+ dependent, and are abolished by pretreatment with NiCl2, suggesting that voltage-gated Ca2+ channels are involved in their generation or transmission. Intracellular injection of Lucifer Yellow and recordings from pairs of cnidocytes reveal that the cnidocytes are electrically coupled to one another, but that they are not uncoupled by heptanol. The role of these chemosensory pathways in priming the cnidocytes for discharge is discussed.
ISSN:1354-2516
1439-1104
DOI:10.1007/s10158-005-0015-6