During a medical test, glucose is supplied directly into a person's bloodstream. The glucose supply is then stopped. The blood glucose concentration is above the normal range and later returns to it.
Which statement describes how the blood glucose concentration is brought back to normal and how hormone release changes as this happens?
glucagon causes body cells to take in more glucose; less glucagon is released as the concentration returns to normal
glucagon causes body cells to respire more glucose; more glucagon is released as the concentration returns to normal
insulin causes body cells to break down glucose; more insulin is released as the concentration returns to normal
insulin causes body cells to take in more glucose; less insulin is released as the concentration returns to normal
94 exam-style questions on Edexcel GCSE Biology 7.4 Blood glucose and the urinary system, covering 7.4.1 Insulin and blood glucose control, 7.4.2 Glucagon and blood glucose regulation, 7.4.3 Type 1 and type 2 diabetes, 7.4.4 Structure of the urinary system, 7.4.5 Structure and function of the nephron, 7.4.6 ADH and water regulation, 7.4.7 Treatments for kidney failure, and 7.4.8 Production of urea in the liver. Each one has a worked solution and a mark scheme showing where the marks go.