首页/ 题库 / [单选题]黑质纹状体系统内使左旋多巴转化为多巴胺的的答案

黑质纹状体系统内使左旋多巴转化为多巴胺的酶是()

单选题
2021-12-26 00:01
A、单胺氧化酶
B、多巴胺脱羧酶
C、酪氨酸羟化酶
D、儿茶酚胺邻甲基转移酶
E、胆碱酯酶
查看答案

正确答案
B

试题解析
脑内多巴胺递质通路主要为黑质-纹状体系。黑质致密部多巴胺能神经元自血流摄入左旋酪氨酸在细胞内酪氨酸羟化酶作用下转化为左旋多巴,左旋多巴经多巴胺脱羧酶转化为多巴胺。通过黑质-纹状体束,多巴胺作用于壳核、尾状核突触后神经元,最后被分解成高香草酸。

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