Question: What type of cell contributes to the blood-brain barrier in the central nervous system?
Disambiguated questions and answers: question: What type of cell contributes to the blood-brain barrier in the central nervous system by restricting passage of substances?
What type of cell contributes to the blood-brain barrier in the central nervous system by providing biochemical support to endothelial cells?
answer: endothelial cells
endothelial cell
Astrocyte cell
Natural Questions answer: endothelial cells (from the Wikipedia article "Blood–brain barrier")