【問題】請問<蛛網膜arachnoid >有沒有包含血管?

[txreformer 10]

請問<蛛網膜arachnoid >有沒有包含血管?康熹版textbook寫沒有血管

可是精通寫 因為佈滿血管所以稱作蛛網膜arachnoid

翰林無敵也是這樣寫

還請各位指導

謝謝

2.

請問尿酸是哪裡形成的? 好像只找到是與攝食嘌呤有關

請問是何處代謝形成的?

此內容已被編輯, March 6, 2010 ,由 txreformer

[txreformer 10]

以下是esovisor ( 研究生 1 級 )的回答

1.Arachnoid mater本身是沒有血管的。但其下方的蛛網膜下腔則佈滿血管。

2.尿酸在肝臟生成，腎臟排除。

1. http://en.wikipedia.org/wiki/Uric_acid

Uric acid is produced by xanthine oxidase(這個酶位在肝臟) from xanthine and hypoxanthine, which in turn are produced from purine.

In humans and higher primates, uric acid is the final oxidation (breakdown) product of purine metabolism and is excreted in urine(腎排出)，

2. xanthine oxidase

http://en.wikipedia.org/wiki/Xanthine_oxidase

In humans, xanthine oxidase is normally found in the liver (肝臟)and not free in the blood.

可以參考Gray's anatomy.

蛛網膜下面血管比較多，上面大多數地方是跟硬腦膜靠的很近。

http://faculty.irsc.edu/FACULTY/TFischer/AP1/meninges.jpg