Final answer:
Insulin is released into the blood when blood-glucose levels are high. It is produced by the pancreas in response to rising blood glucose levels and allows cells to utilize blood glucose and store excess glucose for later use.
Step-by-step explanation:
Insulin is released into the blood when blood-glucose levels are high. It is produced by the pancreas in response to rising blood glucose levels and allows cells to utilize blood glucose and store excess glucose for later use.
When blood glucose levels rise above the normal range, pancreatic beta cells release insulin into the bloodstream, which signals cells to take up the excess glucose from the blood until the level of blood glucose decreases to the normal range.