Agroup of cells that carry out similar tasks in the cns are called a but a group of cells that carry out similar tasks in the pns are called a a group of axons that travel together in the cns are called a but a group of axons that travel together in the pns are called a in the cns is the type of nervous tissue made up of cell bodies, dendrites, and axon terminals (and some unmyelinated axons) while is the type of nervous tissue made up mostly of myelinated axons.