Inside the human stomach
Chapter 1
The physical blender
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Chapter 2
The chemical cauldron
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Chapter 3
The ultimate self-defense
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Chapter 4
The brain-gut hotline
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YOUR GOAL
Master of Inside the human stomach
Ch 4 · The brain-gut hotline
Fun Fact
Serotonin source: Over 90% of your body's serotonin—the chemical that regulates mood—is produced in your gut, not your brain.
Glossary
vagus nerve (noun)
A major cranial nerve that interfaces with parasympathetic control of the heart, lungs, and digestive tract. It serves as the primary physical pathway transmitting stress signals from the brain directly to the stomach.
A major cranial nerve that interfaces with parasympathetic control of the heart, lungs, and digestive tract. It serves as the primary physical pathway transmitting stress signals from the brain directly to the stomach.
Quiz
What percentage of fibers in the vagus nerve carry signals from the gut to the brain?