OCR GCSE Biology B · J257
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Glucagon and InsulinInsulin and glucagon are described as antagonistic because they produce opposite effects. Insulin lowers blood glucose concentration, whereas glucagon raises it. They do not work against each other wastefully: the pancreas varies their release according to which correction is needed.