Which of the following statements does not accurately describe a mechanism involved in the endocrine regulation of blood glucose concentration?
Glucagon binds to specific transmembrane receptors on hepatocytes, activating adenylate cyclase to convert ATP into the second messenger cyclic AMP (cAMPcAMPcAMP).
Adrenaline binds to receptors on liver cells, activating an enzyme cascade via protein kinase A that stimulates glycogenolysis.
Insulin stimulates the translocation of vesicles containing GLUT4 glucose transporter proteins to the plasma membrane of muscle and adipose cells.
Glucagon stimulates the active transport of glucose into hepatocytes by activating membrane-bound carrier proteins during periods of hypoglycemia.
23 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.