Describe the structure and function of the blood brain barrier.

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College Answer

There was general lack of understanding of the conceptual framework of the blood brain 
barrier (BBB) and its function. To attain a pass, candidates were required to describe the 
concept of BBB as a physical and a transport barrier, describe the role of tight junctions and 
glial cells and identify important barrier functions with some examples of things commonly 
transported across or excluded.