How do materials exchange between blood and nerve cells in the brain?
D000818:Animals; D001812:Blood-Brain Barrier; D066298:In Vitro Techniques; D007865:Leeches; D009457:Neuroglia / Q000502:physiology*; D011188:Potassium / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism*
D012964:Sodium; D011188:Potassium