Insulin and Glucagon

This lesson explains how blood glucose levels are regulated by insulin and glucagon through a negative feedback system. After consuming carbohydrates, blood glucose levels rise, prompting the pancreas to release insulin, which helps convert glucose to glycogen in the liver and facilitates glucose uptake by body cells. This process lowers blood glucose to optimal levels. Conversely, when blood glucose levels drop, glucagon is released, stimulating glycogen breakdown into glucose, raising blood glucose levels. The video highlights the importance of these hormones in maintaining glucose balance and the implications of system failure, such as diabetes.

What happens to your blood glucose level after consuming a meal high in carbohydrates?

• It decreases significantly.

• It fluctuates randomly.

• It increases.

• It remains unchanged.

Which organ is primarily targeted by insulin to help lower blood glucose levels?

• Kidneys

• Stomach

• Heart

• Liver

What is the primary function of insulin in the body?

• To secrete glucagon

• To increase blood glucose levels

• To convert glycogen into glucose

• To promote glucose uptake by cells

When blood glucose levels drop, which hormone is released by the pancreas?

• Insulin

• Thyroxine

• Adrenaline

• Glucagon

How does glucagon affect blood glucose levels?

• It has no effect on blood glucose levels.

• It keeps them constant by inhibiting insulin.

• It increases them by breaking down glycogen into glucose.

• It decreases them by converting glucose to glycogen.