Is there more gray matter or white matter in the brain?

Question

and why? (because I would think since every neuron has an axon then the amount of gray matter and white matter should be the same)

Answer 1

yes there is

Answer 2

White matter consists of myelinated sensory and motor neurons. The rest of the brain consists of interneurons (which appear grey) whose axons are not myelinated. The myelination is important as it causes the action potential to reach the terminal buttons more rapidly due to "Saltatory Conduction" (the action potential "jumps" from node of Ranvier to node of Ranvier). When the myelin sheath breaks down due neurological disease, sensory information takes a much longer time to reach the appropriate brain area for processing, and motor information much longer to reach the muscles to produce movement. There is significantly more interneurons than white matter in the brain.

Answer 3

White matter is composed of myelinated nerve cell processes, or axons, which connect various gray matter areas (the locations of nerve cell bodies) of the brain to each other, and carry nerve impulses between neurons. Does not have to be the same since not all neurones have myelin.

cortical white matter accounts for 35% of total brain size in the human (Link 1.)