Lesson on the Cori cycle, introducing the importance and purpose of the Cori cycle and discussing how the Cori cycle can recycle lactic acid, produced from anaerobic metabolism in skeletal muscle, in the liver to form glucose through gluconeogenesis. Intensive exercise and other hypoxic conditions induce anaerobic metabolism in muscle cells, which leads to the production of lactic acid from pyruvate via the enzyme lactate dehydrogenase (LDH). If this lactic acid is left in the muscle cell, the pH of the muscle cell can decrease and cause detrimental effects to the muscle. Therefore, the lactic acid is transported out of the muscle cell through specific transporters located in the muscle cell membrane. The hydrogen ions from the lactic acid are then buffered by the blood and/or removed from the blood in the form of carbon dioxide. The remaining lactate is transported into the liver, where it can be used as a precursor for gluconeogenesis.
Hey everyone! Here is a lesson on the Cori cycle and lactic acid metabolism. In this lesson, you will learn the differences between aerobic and anaerobic metabolism in skeletal muscle, and how lactic acid is produced. You will also learn how that lactic acid is transported out of the cell and into the blood, and how the blood buffers and removes excessive hydrogen ions (protons) produced from lactic acid hydrolysis. This video then discusses how the lactate is transported into the liver hepatocyte, and how the lactate is used as a precursor for gluconeogenesis.
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DISCLAIMER: This video is for educational purposes only and information in this lesson SHOULD NOT be used for medical purposes alone. Although I try my best to present accurate information, there may be mistakes in this video. If you do see any mistakes with information in this lesson, please comment and let me know.