â Must-know
The nervous system comprises two main cell types: neurons and glial cells.
Neurons are highly specialized cells and the functional units of the nervous system; humans have about 100 billion neurons.
Neurons secrete neurotransmitters and neurotrophic factors.
Neurons have very high metabolic activity and consume large amounts of oxygen, glucose, and ATP.
Further detail
Neurons are excitable cells, like myocytes and glandular cells.
Neurons are amitotic cells.
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