IBBiologySLTopic QuestionsContinuity & ChangeHomeostasis

Syllabus Edition

First teaching 2023

First exams 2025

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Homeostasis (SL IB Biology)

Topic Questions

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1
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Which of the following cells in the pancreas secrete insulin?

  • Alpha cells

  • Beta cells

  • Exocrine cells

  • All of the above

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2
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Which of the following statements (I - IV) correctly describe Type I diabetes?

I. It usually develops in those aged 40 and over, however more and more young people are developing the condition.

II. It is a condition in which the pancreas fails to produce sufficient insulin to control blood glucose levels.

III. It is normally treated with regular blood tests to check glucose levels, insulin injections, and a diabetes-appropriate diet.

IV. It is more common than Type II diabetes.

  • II and III

  • II, III and IV

  • I, III and IV

  • I and II

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1
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Which of the following are roles of thyroxin?

  1. Targets metabolically active regions, such as adipose tissue.
  2. Increase the rate of protein synthesis.
  3. Inhibits the appetite and reduces food intake.
  4. Increase the generation of body heat.

  • II only

  • I and II only

  • II and IV only

  • I, II, III and IV

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2
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A one year old child displays fatigue and excessive thirst over a period of time. A urine test reveals the presence of glucose.

Which of the following would be the most likely diagnosis?

  • Type I diabetes as the body is unable to respond to the presence of insulin.

  • Type I diabetes as the beta cells in the islets of Langerhans were destroyed.

  • Type II diabetes as the body does not have sufficient insulin receptors on target cells.

  • Type II diabetes as the alpha cells in the islets of Langerhans was destroyed.

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3
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In which of the following scenarios would there be an increase in the breakdown of glycogen in the liver?

  • When the beta cells of the islets of Langerhans secrete insulin.

  • When the beta cells of the islets of Langerhans secrete glucagon.

  • After eating a meal high in carbohydrates.

  • When the alpha cells of the islets of Langerhans secrete glucagon.

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