Knowing that the BBB is formed by sheets of cells whose cell membranes are attac
ID: 70123 • Letter: K
Question
Knowing that the BBB is formed by sheets of cells whose cell membranes are attached to each other: What type of cell junctions must be used between its cells? So, the cell membranes of the BBB form the barrier. Knowing this, can hypotheisze the chemical nature - polar or nonpolar - of materials that are prevented from crossing from the blood to the brain. Materials that are prevented from crossing are: polar/ nonpolar. Provide a logical and reasonable explanation for your answer. On a larger scale, recall that multiple neurons work together to form an "information highway or chain" allowing communication between structures of the PNS, within the CNS, or between the PNS and CNS.Explanation / Answer
The blood–brain barrier is formed by brain endothelial cells, which are connected by tight junctions with an extremely high electrical resistivity .Tight epithelia have tight junctions that prevent most movement between cells.
The BBB is semi-permeable; that is, it allows some materials to cross, but prevents others from crossing,and materials that are prevented from crossing are nonpolar as the BBB allows only the following molecules :
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