Regulatory Actions of 5-Hydroxytryptamine and Some Neuropeptides on the Heart of the African Giant Snail, Achatina fulica Ferussac : Physiology
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概要
- 論文の詳細を見る
Effects of putative neurotransmitters and modulators on the atrium preparation of the African giant snail, Achatina fulica were observed to investigate the regulatory mechanisms of these substances on the heart beat. Application of 5-hydroxytryptamine (5-HT) as well as stimulation of a heart excitatory neuron, PON, resulted in the enhancement of the heart beat. The enhancement of the beat was blocked by a 5-HT blocker, methysergide. A neuropeptide FMRFamide potentiated the excitatory responses of the atrium to both PON stimulation and 5-HT application, whereas small cardioactive peptide B (SCP_B) depressed them. A burst of impulses in the cerebral neuron, d-RCDN or d-LCDN, evoked excitatory response in the heart excitatory neurons, TAN, TAN-2 and TAN-3, as well as in PON. It depolarized the membrane and increased the frequency and duration of spikes in three TANs. Similar responses were elicited by 5-HT application. On the contrary, FMRFamide hyperpolarized the membrane and shortened the spike duration in three TANs and PON. The experiment of current measurement showed that 5-HT and FMRFamide act antagonistically in the heart excitatory neurons.
- 社団法人日本動物学会の論文
- 1990-06-15
著者
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Furukawa Y
Hiroshima Univ. Hiroshima
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Kobayashi M
Department Of Aquatic Bioscience Graduate School Of Agricultural And Life Sciences The University Of
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Furukawa Yasuo
Physiological Laboratory Faculty Of Integrated Arts And Sciences Hiroshima University:(present Addre
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Kobayashi Makoto
Physiological Laboratory, Faculty of Integrated Arts and Sciences, Hiroshima University
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HORI KATSUHIKO
Physiological Laboratory, Faculty of Integrated Arts and Sciences, Hiroshima University
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Hori Katsuhiko
Physiological Laboratory Faculty Of Integrated Arts And Sciences Hiroshima University
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