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In general it is the reciprical action of the hormones of the fed and fasted state — insulin and glucagon — that are responsible for this, together with the differences in hormone-sensitivity of the glucose transporters in muscle and brain. See the accepted answer to this question: During starvation, does the human body do anything to prioritize which organs ...


Short answer Neurons were (and still are) often identified based on their histological features (e.g., by Cajal). In turn, the structural hallmarks of neurons are often related to their specific functions. Background The question is broad and difficult to answer without restricting to some example types of neurons. As you say, about 10,000 types of neurons ...


Yes, if you do it long enough. You can even die from not breathing, so that falls under the definition of permanent brain damage.

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