Question

One component of the blood-brain barrier is tight junctions between non-fenestrated capillary epithelial cells. What is the most important element of the blood-brain barrier?

1) Tight junctions
2) Non-fenestrated capillary epithelial cells
3) Blood-brain barrier
4) Fenestrated capillary epithelial cells

Answer 1

Tight junctions between non-fenestrated capillary epithelial cells are the most important element of the blood-brain barrier.

Step-by-step explanation:

The most important element of the blood-brain barrier is tight junctions between non-fenestrated capillary epithelial cells.

Tight junctions are regions where adjacent cells are tightly joined together, forming a barrier that prevents substances from leaking between the cells. In the context of the blood-brain barrier, tight junctions play a crucial role in controlling the transfer of blood components to the brain, thus protecting the brain from potentially harmful substances.