What is the action of insulin regarding blood sugar levels?

Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into the body's cells, particularly muscle and fat cells. When blood sugar levels rise, such as after a meal, the pancreas secretes insulin to promote the absorption of glucose from the bloodstream. This action effectively lowers blood sugar levels, allowing the body to use glucose for energy or store it for later use. Insulin also helps store excess glucose in the liver in the form of glycogen and can promote the conversion of some glucose into fat if energy needs are met. Therefore, the primary action of insulin is to lower blood sugar levels in response to elevated glucose levels in the blood.