The blood-brain barrier is formed by capillary endothelial cells. It allows the passage of water, some gases, and lipid-soluble molecules by passive diffusion. It also allows the selective transport of molecules such as glucose and amino acids which are crucial to nerve function.
A few small regions in the brain do not have a blood-brain barrier.
References[change | change source]
- de Vries, Helga E. et al (1997). "The blood-brain barrier in neuroinflammatory diseases". Pharmacological Reviews 49 (2): 143–156. . http://pharmrev.aspetjournals.org/content/49/2/143.
- "About". Blood brain barrier. Johns Hopkins University. http://bloodbrainbarrier.jhu.edu/about/. Retrieved 7 May 2013.