Assuming I eat some food which needs 4 hours of digestion in the stomach. 3 hours and 55 minutes later I eat something else which can get more easily digested but still needs, let‘s say 1 hour, of digestion. How does our stomach know what to pass on and what to keep?
In: 5
So an actual answer to your question: HOW does the stomach know….
>“The gastric emptying rate is a carefully regulated process consisting of different phases. Metabolic load, neural regulatory mechanisms and hormonal influence achieve a balanced emptying of contents from the stomach into the duodenum for absorption in the small intestine.
Which in ELI5 means there is a feedback loop between the cells lining the stomach and various hormones that interact with the nervous system.
The cells lining the stomach have sensors in them that detect what’s happening and signal the nervous system all kinds of things….like “it’s time to feel full and stop eating”, or “it’s time to pass the food into the intestines”, or “this food is spoiled and we need to throw it back up”.
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