CBSE Class 10 Answered

The cerebellum contains more neurons than the rest of the brain put together, but it only takes up 10% of total brain volume because of its large number of tiny granule cells. Granule cells of the cerebellum are among the smallest neurons in the brain which are densely packed. Due to their small size and a granule cell would not respond if only a single one of its inputs was active, but would respond if more than one were active so many neurons can be situated in the cerebellum.