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The effect of pericardial organ horm...

Saver, Michelle Anne.

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The effect of pericardial organ hormones on shore crab, Carcinus maenas, hearts and cardiac ganglia.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The effect of pericardial organ hormones on shore crab, Carcinus maenas, hearts and cardiac ganglia./
作者:	Saver, Michelle Anne.
面頁冊數:	162 p.
附註:	Source: Dissertation Abstracts International, Volume: 59-01, Section: B, page: 0024.
Contained By:	Dissertation Abstracts International59-01B.
標題:	Biology, Animal Physiology. -
電子資源:	http://wwwlib.umi.com/dissertations/fullcit/NQ24559
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ24559
ISBN:	0612245594

The effect of pericardial organ hormones on shore crab, Carcinus maenas, hearts and cardiac ganglia.
Saver, Michelle Anne.

The effect of pericardial organ hormones on shore crab, Carcinus maenas, hearts and cardiac ganglia. - 162 p.

Source: Dissertation Abstracts International, Volume: 59-01, Section: B, page: 0024.

Thesis (Ph.D.)--University of Calgary (Canada), 1997.

The precise site(s) and mode(s) of hormonal action on crustacean hearts remain largely unresolved due primarily to the considerable diversity of various species, preparations and hormones used. This study aimed to identify and characterize the precise sites and modes of action of five endogenous hormones on several different preparations from the same species of crab, Carcinus maenas. Another aim was to identify excitability and hormonal responses of neurons in a central pattern generator located in the cardiac ganglion.

ISBN: 0612245594Subjects--Topical Terms:

1017835
Biology, Animal Physiology.

The effect of pericardial organ hormones on shore crab, Carcinus maenas, hearts and cardiac ganglia.
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245 1 4 $a The effect of pericardial organ hormones on shore crab, Carcinus maenas, hearts and cardiac ganglia.
300 $a 162 p.
500 $a Source: Dissertation Abstracts International, Volume: 59-01, Section: B, page: 0024.
500 $a Adviser: Jerrel L. Wilkens.
502 $a Thesis (Ph.D.)--University of Calgary (Canada), 1997.
520 $a The precise site(s) and mode(s) of hormonal action on crustacean hearts remain largely unresolved due primarily to the considerable diversity of various species, preparations and hormones used. This study aimed to identify and characterize the precise sites and modes of action of five endogenous hormones on several different preparations from the same species of crab, Carcinus maenas. Another aim was to identify excitability and hormonal responses of neurons in a central pattern generator located in the cardiac ganglion.
520 $a A multi-level experimental approach was taken to accomplish these goals. A systems level study first surveyed the effects of five endogenous hormones on two types of in situ heart preparations. With each successive step taken during this study, from in situ to isolated hearts to individual neurons, sites of action were narrowed to fewer possibilities. In the final phase of the study, an in vitro cell culture system was developed to study in situ and in vitro cardiac ganglion neurons.
520 $a Each of the hormones tested acted on the cardiac ganglion neurons. Hormone action on these neurons was indirectly measured as changes in heart rate, extracellular electromyograms, and intracellular excitatory junction potentials from in situ and isolated hearts. Hormone effects on ganglionic neurons were assessed directly using isolated neurons and intact ganglion preparations. Of several hormones tested (dopamine, 5-hydroxytryptamine, octopamine, proctolin, and crustacean cardioactive peptide), only the peptide proctolin had additional sites of action outside the cardiac ganglion. These included the myocardium (as indicated by disproportionate changes in contractility relative to ganglionic output) and possibly the cardioarterial valves and central nervous system regulatory fibres.
520 $a This study provided important clues as to how hormone-induced changes in cardiac contraction rate and force can lead to changes in cardiac output and blood flow that are essential for an animal to meet its metabolic demands under various physiological or environmental conditions. The in vitro cell culture system is the most significant development of this study, and will provide exciting opportunities to study the intrinsic and network properties of the crustacean cardiac ganglion network at a resolution unattainable before.
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710 2 0 $a University of Calgary (Canada). $3 1017619
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790 1 0 $a Wilkens, Jerrel L., $e advisor
790 $a 0026
791 $a Ph.D.
792 $a 1997
856 $u http://wwwlib.umi.com/dissertations/fullcit/NQ24559
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ24559