The brain cannot use which energy sources?

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Multiple Choice

The brain cannot use which energy sources?

Explanation:
The brain runs on glucose and needs oxygen to burn it for energy. It cannot use fats or proteins directly as fuel because neurons aren’t equipped to oxidize fatty acids or to metabolize amino acids for quick energy without disrupting brain function. In very long fasting, the brain can use ketone bodies derived from fats, but that’s a special condition; under normal circumstances fats and proteins aren’t usable energy sources for brain cells. Water isn’t an energy source either, though it’s essential for bodily processes.

The brain runs on glucose and needs oxygen to burn it for energy. It cannot use fats or proteins directly as fuel because neurons aren’t equipped to oxidize fatty acids or to metabolize amino acids for quick energy without disrupting brain function. In very long fasting, the brain can use ketone bodies derived from fats, but that’s a special condition; under normal circumstances fats and proteins aren’t usable energy sources for brain cells. Water isn’t an energy source either, though it’s essential for bodily processes.

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