Document Detail

THERMAL INCREMENTS FOR PULSATION-FREQUENCY IN "ACCESSORY HEARTS" OF NOTONECTA.
Jump to Full Text
MedLine Citation:
PMID:  19872338     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The frequencies of pulsation of the "accessory hearts" in the isolated swimming-legs of Notonecta were studied in relation to temperature, with the idea that in such organs central nervous control is impossible, and that in an isolated system irreversibly proceeding toward death it might be expected that further evidence would be found regarding the supposed specific significance of critical thermal increments. A number of values of micro are found, commonly 8,200; 16,200; or 32,200; less frequently 11,400; 19,800; and 24,500. These values are definitely contrasted with that (12,300) typical for heart beat frequencies in arthropods. They exhibit interrelationships of the sorts already found in other cases. There occur also sharp irreversible changes in frequency of pulsation, which may or may not be accompanied by change of increment. The net result is held to be confirmatory of the interpretation of thermal relations proposed in earlier papers.
Authors:
W J Crozier; T J Stier
Related Documents :
3790648 - The relationship between menstrual cycle changes in nervous system activity and psychol...
15485508 - Wavelet-based analysis of heart-rate-dependent ecg features.
12436268 - The origins of physiological tremor as deduced from immersions of the finger in various...
15294218 - Tremor analysis in two normal cohorts.
20352788 - Colour tuneability in sol-gel nano-glass-ceramics comprising yb(3+)-er(3+)-tm3+ co-dope...
21414338 - Effects of stimulus contrast and temporal delays in saccadic distraction.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of general physiology     Volume:  10     ISSN:  0022-1295     ISO Abbreviation:  J. Gen. Physiol.     Publication Date:  1927 Mar 
Date Detail:
Created Date:  2010-06-23     Completed Date:  2010-06-23     Revised Date:  2010-09-27    
Medline Journal Info:
Nlm Unique ID:  2985110R     Medline TA:  J Gen Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  479-500     Citation Subset:  -    
Affiliation:
Laboratory of General Physiology, Harvard University, Cambridge.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Full Text
Journal Information
Journal ID (nlm-ta): J Gen Physiol
ISSN: 0022-1295
ISSN: 1540-7748
Publisher: The Rockefeller University Press
Article Information
Download PDF
Copyright © Copyright, 1927, by The Rockefeller Institute for Medical Research
Accepted Day: 20 Month: 1 Year: 1927
Print publication date: Day: 20 Month: 3 Year: 1927
Volume: 10 Issue: 4
First Page: 479 Last Page: 500
ID: 2140939
PubMed Id: 19872338

THERMAL INCREMENTS FOR PULSATION-FREQUENCY IN "ACCESSORY HEARTS" OF NOTONECTA
W. J. Crozier
T. J. B. Stier
From the Laboratory of General Physiology, Harvard University, Cambridge.


Article Categories:
  • Article


Previous Document:  THE EFFECT OF CERTAIN RESPIRATORY INHIBITORS ON THE RESPIRATION OF CHLORELLA.
Next Document:  TEMPERATURE AND FREQUENCY OF CARDIAC CONTRACTIONS IN EMBRYOS OF LIMULUS.