Abstract
The biogenic amine octopamine (OCT) appears to be involved in cell volume regulation in the horseshoe crab, Limulus polyphemus, during hypoosmotic stress. OCT is present in relatively large amounts (160 nmoles/g dry wt) in the cardiac ganglion. Furthermore, OCT is released from the isolated ganglion during exposure to hypoosmotic media. This release is reflected in the elevation of blood OCT concentrations from basal levels of 4 X 10(-9) M reaching 1.2 X 10(-8) M within 72 h of exposure of animals to hypoosmotic media. The circulating OCT potentiates the hypoosmotically-induced reductions of intracellular Na+ and Cl- by a ouabain-sensitive mechanism which complements the main ion regulating (ouabain-insensitive) mechanisms utilized during cell volume recovery.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
