Examlex
Suppose the Hubble Space Telescope discovers a series of planets with these characteristics moving around a star that resembles our Sun: spherical, solid surfaces; mean densities about 4 times that of water; radii about 4000 km; and low-density atmospheres. How would these planets be classified in comparison with our solar system?
Blood-Brain Barrier
A semipermeable barrier between the brain's blood vessels and the brain tissue that prevents certain substances from passing through.
Astrocytes
Star-shaped glial cells in the brain and spinal cord involved in biochemical support of endothelial cells and repair processes in the central nervous system.
Microglia
Glial cells that originate in the blood, aid in cell repair, and scavenge debris in the nervous system.
Astrocytes
Star-shaped glial cells in the brain and spinal cord that play a crucial role in supporting neurons, forming blood-brain barrier, and regulating neurotransmitters.
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