Gastrointestinal (GI) Physiology…The Basics (Introduction) | Physiology Series

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All aboard for a wonderful GI physiology journey :)

I may not watch the video now but thanks for making this video. I have recently started studying the GI and I have really struggled with the physiology since it was my weak link during the basic studies.

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Regarding the quiz- I assume it deals with insulin secretion via deplorization of beta cells within the pancreas. As your sugar level rise, potassium channels will stop leaking potassium in the beta cells, therefore depolarizing the beta cells and allowing calcium influx, to which that will influence secretion of insulin into the bloodstream per activation of GLUT-4 transporters. I also assume this is why eating simple sugars (glucose, fructose, galactose) on a consistent basis that's caloric dense exacerbates weight gain and/ or can make you feel tired i.e., you eat a sugar snack, your body secretes insulin, but it secretes too much, therefore resulting in hyperinsulinemia, and because now your blood sugar ends up being low again, your body tricks itself into thinking it's "hungry," to which a domino effect occurs.

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Is it stomach that convert food into molecules. or is it the pancreatic enzymes . Thank you