psychology 

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KembaraXtra-Psychology – Blood–Brain Barrier

The blood–brain barrier is a selectively permeable membrane that protects the brain by regulating which substances in the bloodstream can enter neural tissue. Formed by tightly joined endothelial cells, it prevents toxins and pathogens from reaching the brain while allowing essential nutrients to pass. This barrier is critical for maintaining stable neural functioning but also complicates drug delivery to the brain.


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