Relate the terms: Insulin, pancreas, glucose, energy, insulin receptors, cell, cell membrane. Highlight each term.

Insulin is a peptide hormone produced by beta cells of the pancreatic islets in the pancreas. It regulates the metabolism of carbohydrates, fats and protein by promoting the absorption of glucose from the blood into liver, fat through proteins, called pumps, which actively transport it through the cell membrane. Insulin promotes, through binding to insulin receptors, the synthesis of glycogen, fatty acids and triglycerides which can be used to produce energy in fasting conditions through catabolic processes.

between the two muscle layers is the myenteric or auerbach's plexus, which controls peristalsis. in the colon, the muscularis externa is much thicker because the feces are large and heavy, requiring more force to push along. the stomach has a third layer of muscularis externa: the inner oblique layer.

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