Select the correct option:
Blood-brain barrier in adults has ........... junctions between cells.

Tight

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Adhering

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Gap

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Occluding

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Solution

The correct option is A Tight
The blood-brain barrier is a dynamic conduit for transport taking place between the brain and blood. The blood vessels and brain are lined with endothelial cells that are wedged tightly together, creating a nearly impermeable boundary.
the blood-brain barrier helps block harmful substances from entering the brain.
So the correct option is option A.

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