Final answer:
The nervous system is composed of two main types of cells: neurons, which transmit signals, and glial cells, which support neurons. So, the statement in question is false.
Step-by-step explanation:
The statement that the nervous system is not composed of cells but instead is made up of fibers called neurons and glia is false. In fact, the nervous system is made up of two types of cells: neurons and glial cells (or glia). Neurons are specialized cells capable of transmitting electrical and chemical signals, which are essential for communication within the body.
They consist of dendrites, a cell body, and an axon. Glial cells provide essential support and nutrients to neurons, maintain homeostasis, and form myelin in the nervous system. They also play a role in signal transmission and are essential for the proper functioning of neurons.