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ELECTROPHYSIOLOGICAL STUDY OF NEUROSECRETORY NEURONS IN EYESTALK OF SHRIMP FENNEROPENAEUS CHINENSIS
Author(s): 
Pages: 555-561
Year: Issue:  6
Journal: OCEANOLOGIA ET LIMNOLOGIA SINICA

Keyword:  中国对虾XO-SG复合体神经内分泌细胞电生理特征;
Abstract: 利用膜片钳技术对体外培养24-48h中国对虾的视神经节端髓A型和B型神经内分泌细胞进行电生理特征研究.电流钳的结果表明,A型细胞具有自发和诱发放电活动;B型细胞没有记录到明显放电活动.在电压钳模式下,中国对虾视神经节神经内分泌细胞表达TTX敏感Na+通道、高电压激活L型Ca2+通道、TEA敏感晚钾通道、早钾通道.Ca2+通道电流在 -40--30mV被激活,在-10-?0mV时达到峰值;Ca电流受钳制电压的影响.一定电压范围内,钳制电压越负,Ca电流就越大.外向的钾通道电流均在-40mV左右被激活.晚钾通道电流对TEA敏感,但TEA不能完全阻断晚钾通道电流.
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