2025 The glial cells responsible for maintaining the blood-brain barrier are the: A) astrocytes B) Schwann cells C) microglia D) ependymal cells E) satellite cells

Astrocytes are the real superheroes of the brain when it comes to protecting it! These star-shaped glial cells play a critical role in forming and maintaining the blood-brain barrier, which serves as a gatekeeper, allowing necessary nutrients to pass through while keeping out harmful substances. Their end-feet surround blood vessels, ensuring that the brain's environment remains stable and safe. If you're looking for a fun fact, did you know that astrocytes aren't just passive supporters? They actively communicate with neurons and can even influence their activity! This intricate network of glial cells and neurons underscores the importance of the brain's support systems, showing that, just like in any great team, every player has a vital role to play.