GCSE Biology - Control of Blood Glucose Concentration #56

The video explains how blood glucose concentration is regulated by insulin and glucagon. Insulin lowers blood glucose by promoting uptake into cells, while glucagon raises it by converting glycogen to glucose. These hormones work in a negative feedback loop to maintain glucose levels within a normal range, preventing damage from high levels and ensuring sufficient supply for cellular respiration.

What happens to blood glucose levels after consuming a carbohydrate-rich meal?

• They decrease immediately.

• They remain constant.

• They increase as glucose is absorbed into the bloodstream.

• They fluctuate randomly.

Which organ releases insulin in response to high blood glucose levels?

• Liver

• Pancreas

• Stomach

• Intestines

What is the primary function of insulin in the body?

• To increase blood glucose levels

• To convert glucose into fat

• To break down proteins

• To decrease blood glucose levels by promoting glucose uptake

How does Glucagon affect blood glucose levels?

• It has no effect on blood glucose levels.

• It converts glucose into glycogen.

• It decreases blood glucose levels.

• It increases blood glucose levels by converting glycogen to glucose.

What is the relationship between insulin and Glucagon in regulating blood glucose?

• They have no relationship.

• Insulin decreases and Glucagon increases blood glucose levels, forming a negative feedback loop.

• They both decrease blood glucose levels.

• They both increase blood glucose levels.