A YouTube video transcript from "Metabolism Made Easy" explains insulin's key actions within the liver. The video details how insulin promotes glucose storage and utilization by stimulating glycogen creation and glucose breakdown. Furthermore, the transcript highlights that insulin actively suppresses the liver's production and release of glucose through the inhibition of glycogen breakdown and new glucose synthesis. Essentially, the content describes insulin's role in lowering blood glucose levels by influencing crucial metabolic pathways in the liver.

When insulin resistance develops, these effects of insulin on the liver's consumption and production of glucose may become impaired, thus resulting in hyperglycemia. In addition, insulin-mediated glucose uptake by GLUt-4 transporters in muscle and adipose tissue is likely to be decreased, thus contributing further to hyperglycemia.