Regulation of blood glucose 0.0 / 5 ? BiologyHuman, animal and plant behaviourA2/A-levelOCR Created by: Steff06Created on: 01-06-16 10:36 What is the exocrine function of the pancreas? Cells manufacture and release digestive enzymes. 1 of 16 What is the endocrine function? Islets secrete hormones into the blood. 2 of 16 What is the role of the pancreatic duct? To carry fluid containing enzymes into the 1st part of the small intestine. 3 of 16 What are the enzymes that the fluid contains? Amylase, trypsinogen, lipase. 4 of 16 What does the fluid also contain and what is its role? Also contains sodium hydrogencarbonate which is alkaline and neutralises the contents of the digestive system. 5 of 16 Describe what happens when the glucose levels are too low Detected by alpha cells which secrete glucagon. Glucagon binds to receptor on hepatocytes. 6 of 16 What are the effects of glucagon? Glycogenolysis, use of more fatty acids in respiration and gluconeogenesis. 7 of 16 What is glycogenolysis? Conversion of glycogen to glucose. 8 of 16 What is gluconeogenesis? Production of glucose by conversion of amino acids and fats. 9 of 16 What happens when blood glucose concentration is too high? Detected by beta cells in Islets of Langerhans which secrete insulin. Insulin binds to receptors on hepatocytes. 10 of 16 What does the binding cause? Binding causes adenyl cyclase to be activated which converts ATP to cAMP. 11 of 16 What does cAMP do? cAMP activates enzymes. 12 of 16 What is the effect of insulin of cells? More glucose channels are placed on the cell surface membrane so more glucose enters the cell. 13 of 16 What is the consequence of more glucose entering the cell? Glycogenesis, more glucose converted into fats and used in respiration. 14 of 16 What is the effect of this? Increased entry of glucose through channels reduces blood glucose concentration. 15 of 16 What is glycogenesis? Glucose converted to glycogen for storage. 16 of 16
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