GCSE Biology - Control of Blood Glucose Concentration #56

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

What happens to blood glucose levels after consuming a meal rich in carbohydrates?

• They fluctuate randomly.

• They decrease immediately.

• They remain constant.

• They increase as glucose is absorbed into the bloodstream.

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

• Intestines

• Liver

• Stomach

• Pancreas

What is the primary function of insulin in the body?

• To break down proteins

• To increase blood glucose levels

• To decrease blood glucose levels by promoting glucose uptake

• To convert glucose into fat

How does Glucagon affect blood glucose levels?

• It decreases blood glucose levels.

• It has no effect on blood glucose levels.

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

• It converts glucose into glycogen.

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

• They both decrease blood glucose levels.

• They both increase blood glucose levels.

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

• They have no relationship.