Solved UPSC CDS/OTA Question
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Q · Nervous Systemmedium · 45s
The blood-brain barrier is primarily formed by:
TopicNervous System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The BBB arises from capillary endothelial cells joined by tight junctions and supported by astrocyte foot processes, restricting passage of pathogens and regulating CNS microenvironment.
Final Answer: Option A - Astrocyte end-feet and tight junctions between endothelial cells