Blood-brain barrier
|
Normal brain tissue has a mechanism that prevents certain substances in the blood, such as substances that are harmful to the brain, from entering the brain, and this mechanism is thought to be due to the action of the inner membrane of the capillaries. This mechanism is called the blood-brain barrier. In fetuses and newborns, this mechanism does not work properly. Neonatal kernicterus occurs when bilirubin, which normally should not enter the brain, enters the brain from the blood. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
|
正常な脳組織には血液中のある物質，たとえば脳にとって有害な物質が脳内に侵入するのを防ぐ機構があり，毛細血管の内膜の働きによるとされている。この機構を血液脳関門と呼ぶ。胎児や新生児ではこれが十分働かない。新生児核黄疸は，正常では入らないはずのビリルビンが血中から脳内に入ることによって起る。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
![Saito [city] - Saito](/upload/images/67cba582eed9a.webp)
![Nagawa [town] - Nagawa](/upload/images/67cc6541a2c96.webp)
Recommend
Yellow earth - Oudo (English spelling)
A homogeneous, porous, loose yellowish brown soil ...
Red Barnacle (English name) Megabalanus roseus
A marine animal of the order Sessile, family Barna...
Cabala
…Kabbalah (or Qabbālāh) is a Hebrew word meaning ...
Yayoicho ruins
This is a Yayoi period ruin located on the cliff e...
schizoid
…One of Kretschmer's personality types. He pr...
Turtle (Kame) - Turtle
A general term for the order Testudins, class of r...
Onbashira pulling rope
…There are many examples of using strings in conn...
Kigarachameshi - Kigarachameshi
...After that, shops selling Nara tea were establ...
The Babylonian Captivity of the Church
...His evangelism gained a wider national public ...
Foreign Affairs Division - Gaikokujimuka
… ［History］ The Ministry of Foreign Affairs was e...
Mikoku Culture - Mikoku Culture
This is the most advanced culture of the Early Pal...
Alto Alentejo - Information on Alto Alentejo
…Southern Portugal, the region south of the Tagus...
Friends - Tomodachi
A person who trusts others and interacts with them...
Levyi front iskusstva (English spelling) Levyifrontiskusstva
...However, dissatisfied with this idealistic rom...
Master Hu (English: Master Hu)
He was from Weicheng, Xianyang County, Shaanxi Pro...