brain
The functional unit of the nervous system is a cell called the neuron.
The spinal cord and the brain make up part of the nervous system called the central nervous system. The rest of the system is made up of the peripheral nervous system.
Nervous system
meninges
the brain,spinal cord and the nerves
tissue
epithelium and nervous tissue
These are the choices, it wouldn't let me put it in the main question. a. brain, spinal cord, organ system, nerve cell nervous tissue b. organ system, population of cells, nervous tissue, brain c. organism, organ system, tissue cell, organ d. nervous system, brain, nervous tissue, nerve cell e. organ system, tissue, molecule, cell
neurons
yes
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like in the nervous system? if that then they are called neurotransmitters