The Digestive System Part 2

The Digestive System Part 2

This is the second part of our two part series on the digestive system. The digestive system includes the GI tract and GI organs. The tract starts at the mouth and runs down the esophagus into the stomach, through the small intestine, large intestine, and finally out of the body. The GI organs include the liver, gallbladder and pancreas. In this webinar, we review how different biomolecules, predominantly carbs, proteins, and fats, are digested, and link these breakdown processes back to biochemistry and organic chemistry.

At a glance


Essential skills

  • Apply biochemistry knowledge of macromolecules to their respective digestion and absorption paths

  • Read protein activation cascades

  • Think about digestive disorders in a clinical framework


Knowledge Fundamentals

  • The digestion and absorption of carbs, proteins, and fats; how they are similar, different, and which enzymes they require

  • The hepatic portal system versus the thoracic duct

  • Hunger hormones ghrelin and leptin


On the MCAT

  • Digestion and excretion are two large systems that are heavily tested on the exam. We recommend studying the renal system alongside the digestive system so you have a complete idea of how the body handles nutrients and waste.


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