Which of the following statements correctly describes how the hormone glucagon works with the liver to regulate blood sugar levels when they fall too low?
Glucagon stimulates the liver to convert glycogen into glucose, increasing blood sugar levels.
Glucagon stimulates the liver to convert glucose into glycogen, decreasing blood sugar levels.
Glucagon works with insulin to convert glycogen into amino acids, increasing blood sugar levels.
Glucagon stimulates the pancreas to absorb more glucose, lowering blood sugar levels.
22 exam-style questions on OCR GCSE Biology 3.3 Maintaining internal environments, covering 3.3.1 Importance of a constant internal environment, 3.3.2 The skin and body temperature, 3.3.3 Insulin and blood sugar, 3.3.4 Glucagon and blood sugar, 3.3.5 Type 1 and type 2 diabetes, 3.3.6 Osmotic changes in body fluids, 3.3.7 Kidneys and water balance, 3.3.8 Structure of the kidney and tubule, 3.3.9 ADH and kidney tubule permeability, and 3.3.10 Responses to temperature and osmotic challenges. Each one has a worked solution and a mark scheme showing where the marks go.