Question

How does our body know when we are hungry?

Answer 1

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The body's systems are complex. "Hunger hormones" (ghrelin) in your blood and an empty stomach signal the brain when you're hungry. Nerves in the stomach send signals to the brain that you're full, but these signals can take up to 20 minutes to communicate -- and by that time, you may have already eaten too much.

Answer 2

"Hunger hormones" (ghrelin) in your blood and an empty stomach signal the brain when you are hungry.

Nerves in stomach send signals to the brain that you are full,these signals can take up to 20 minutes to communicate-and by that time,you may have already eaten too much.