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主题:【原创】经络究竟是否存在?(一) -- 天边眼前

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家园 这文章科普得很好,图也不错,借来一用。

1.Increase the amount of nitric oxide produced in the penis.

2.Increase the amount of cGMP produced in the penis in response to the nitric oxide.

3.Eliminate the PDE in the penis so that the cGMP builds up instead of getting decomposed by the PDE.

Viagra uses method No. 3 -- it eliminates the PDE that is decomposing the cGMP, so cGMP builds up in the penis and has a larger effect on the artery walls. The greater the amount of cGMP, the greater the blood flow, and the greater the blood flow, the greater the degree of the erection.

点看全图

外链图片需谨慎,可能会被源头改

结合引文和图片可以看出,伟哥打断第三过程发挥药理作用。它与诺贝尔奖有关,与NO真没啥关系。

这是NO产生的方程式:

L-精氨酸+NADPH+氧气 —NoS—〉L-瓜氨酸+NO+NADP+

NoS为NO合成酶。

到此为止,我想没啥分歧了吧。

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