Lesson 3.6.4.2.1

3.6.4.2.1 Insulin, glucagon and the liver Quiz: AQA Biology, Unit 6

20 questions

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Lesson 3.6.4.2.1, Insulin, glucagon and the liver: 20 multiple choice questions for the AQA Biology (7402), Unit 6: Organisms respond to changes in their internal and external environments, written with Revision Ninja.

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The 20 questions

  1. Which cells in the pancreas secrete insulin?

    • Acinar cells
    • Beta cells
    • Delta cells
    • Alpha cells
  2. Which process converts stored glycogen back into glucose in liver cells?

    • Gluconeogenesis
    • Glycogenesis
    • Lipogenesis
    • Glycogenolysis
  3. What is the primary effect of insulin on blood glucose concentration?

    • Stabilises blood pressure
    • Decreases blood glucose
    • Increases blood glucose
    • Stabilises blood glucose
  4. Which liver process is directly activated by glucagon to raise blood glucose?

    • Glycolysis
    • Glycogenolysis
    • Glycogenesis
    • Lipogenesis
  5. What is the synthesis of glucose from non-carbohydrate sources called?

    • Glycogenesis
    • Gluconeogenesis
    • Glycolysis
    • Glycogenolysis
  6. How does insulin increase glucose uptake into target cells?

    • Osmotic pressure shifts
    • Direct lipid diffusion
    • Active transport pumps
    • Channel protein insertion
  7. Where do insulin and glucagon bind on target cells?

    • Nuclear receptors
    • Mitochondrial matrix
    • Cytoplasmic enzymes
    • Surface receptors
  8. Which liver process is stimulated when blood glucose rises after a carbohydrate-rich meal?

    • Gluconeogenesis
    • Lipolysis
    • Glycogenesis
    • Glycogenolysis
  9. Which combination of processes occurs in the liver during a prolonged fast?

    • Glycogenesis only
    • Glycogenesis and glycolysis
    • Glycogenolysis and gluconeogenesis
    • Lipogenesis only
  10. Which process do adrenaline and glucagon both stimulate in liver cells?

    • Lipogenesis
    • Glycogenesis
    • Gluconeogenesis
    • Glycogenolysis
  11. What is the immediate consequence of beta cell destruction on blood glucose after a meal?

    • Drops rapidly
    • Reaches zero
    • Remains entirely normal
    • Stays high longer
  12. Which specific cells in the islets of Langerhans secrete the hormone glucagon?

    • Beta cells
    • Acinar cells
    • Alpha cells
    • Delta cells
  13. Blood glucose is 10.0 mmol per dm3 and falls by 20 per cent after insulin acts. What is the new concentration?

    • 8.0 mmol per dm3
    • 2.0 mmol per dm3
    • 12.0 mmol per dm3
    • 7.0 mmol per dm3
  14. What is the effect of blocking glucagon receptors during an overnight fast?

    • No change occurs
    • Blood glucose rises
    • Glycogenesis increases
    • Blood glucose falls
  15. What does the liver do when blood glucose is high?

    • Releases glucose
    • Synthesises amino acids
    • Stores as glycogen
    • Excretes glucose
  16. Why does insulin bind to cell surface receptors instead of entering cells directly?

    • It is too small
    • It is polar
    • It is a monosaccharide
    • It is hydrophobic
  17. Put these events in the most likely order after a rise in blood glucose: 1 glucose enters cells, 2 insulin is secreted by beta cells, 3 blood glucose returns to normal, 4 glycogen synthesis increases. Which sequence is correct?

    • 2, 4, 1, 3
    • 1, 2, 4, 3
    • 3, 2, 1, 4
    • 2, 1, 4, 3
  18. Which measurement shows increased liver glucose output when treated with glucagon?

    • Intracellular ATP drop
    • Released glucose rise
    • Glycogen content rise
    • Amino acid uptake
  19. Blood glucose is 5.0 mmol per dm3 and a hormone causes liver output to rise so that blood glucose increases by 30 per cent. What is the new value?

    • 1.5 mmol per dm3
    • 8.0 mmol per dm3
    • 6.5 mmol per dm3
    • 3.5 mmol per dm3
  20. Which mechanism allows insulin and glucagon to have opposite effects on liver cells?

    • Direct enzyme inhibition
    • Shared cell receptor
    • Distinct surface receptors
    • Intracellular receptors

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