Type O negative blood (red cells) can be transfused to patients of all blood types. It is always in great demand and often in short supply. Type AB positive plasma can be transfused to patients of all other blood types. AB plasma is also usually in short supply.
Blood-brain barrier. A blockade of cells separating the circulating blood from elements of the central nervous system (CNS); it acts as a filter, preventing many substances from entering the central nervous system.
The function of the blood-brain barrier is to allow water, lipid  soluble molecules, and gases into the brain extracellular fluid.  The barrier also lets in molecules that a â¦ re necessary for neural  function such as amino acids and glucose.Stax de Morgan.o put it simply, the main function of a Barrier Island is to protect the coastline, meaning that it serves as a shield for the coast, taking all the damage from the shifting â¦ tides and waves, and the violent waves that would bring severe damage to beaches. Just relate to common knoledge things, like football.