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Why do we need to maintain a constant internal environment?: OCR GCSE Combined Science B questions

Every OCR GCSE Combined Science B exam question on B5.4 Why do we need to maintain a constant internal environment?, 2018–2025, with its mark scheme and examiner’s report.

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2,688 questions

  1. Q8(b)

    June 2025 · Biology Paper 5 Higher

    1 markB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗

  2. Q4(a)

    June 2024 · Combined Science Paper 4 Foundation

    4 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  3. Q4(b)(i)

    June 2024 · Combined Science Paper 4 Foundation

    3 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  4. Q4(b)(ii)

    June 2024 · Combined Science Paper 4 Foundation

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  5. Q6(b)(i)

    June 2024 · Biology Paper 5 Higher

    1 markB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 6

  6. Q6(b)(ii)

    June 2024 · Biology Paper 5 Higher

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 6

  7. Q6(b)(iii)

    June 2024 · Biology Paper 5 Higher

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 6

  8. Q6(c)

    June 2024 · Biology Paper 5 Higher

    3 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 6

  9. Q11(b)(iii)

    June 2023 · Biology Paper 1 Foundation

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 11

  10. Q2(b)(iii)

    June 2023 · Biology Paper 5 Higher

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 2

  11. Q7(e)

    June 2022 · Biology Paper 5 Higher

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 7

  12. Q9(c)

    June 2022 · Biology Paper 5 Higher

    4 marksB5.3 How do hormones control responses in the human body?B5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 9

  13. Q1(a)

    November 2021 · Biology Paper 1 Foundation

    1 markB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 1

  14. Q1(b)

    November 2021 · Biology Paper 1 Foundation

    1 markB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 1

  15. Q4(a)(i)

    June 2019 · Combined Science Paper 4 Foundation

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  16. Q4(a)(ii)

    June 2019 · Combined Science Paper 4 Foundation

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  17. Q4(a)(iv)

    June 2019 · Combined Science Paper 4 Foundation

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  18. Q4(a)

    June 2019 · Combined Science Paper 8 Higher

    3 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4

  19. Q4(c)(i)

    June 2019 · Combined Science Paper 8 Higher

    2 marksB5.4 Why do we need to maintain a constant internal environment?
    The whole paper ↗
    The start of question 4
All 19 questions on Why do we need to maintain a constant internal environment?, as a list
  1. June 2025, Biology Paper 5 Higher, Q8(b) (1 mark): The nervous system and endocrine system respond to internal and external change. Explain the importance of homeostasis. [1]
  2. June 2024, Combined Science Paper 4 Foundation, Q4(a) (4 marks): The graph shows the changes in blood sugar concentration in a person without diabetes immediately after eating. 1400 1300 1200 1100 1000 Blood sugar concentrati
  3. June 2024, Combined Science Paper 4 Foundation, Q4(b)(i) (3 marks): Blood glucose can be measured by doing a finger-prick blood sample. This method uses a needle so that a drop of blood can be taken for testing. A test strip and
  4. June 2024, Combined Science Paper 4 Foundation, Q4(b)(ii) (2 marks): Blood sugar can also be measured by using a sensor placed on a person’s arm which sends information continuously to an app on a smartphone, as shown: © diabetes
  5. June 2024, Biology Paper 5 Higher, Q6(b)(i) (1 mark): Suggest one reason for repeating the test three times at each temperature. [1]
  6. June 2024, Biology Paper 5 Higher, Q6(b)(ii) (2 marks): Identify three different variables in this investigation: Independent variable Dependant variable A variable that should be controlled [2]
  7. June 2024, Biology Paper 5 Higher, Q6(b)(iii) (2 marks): Explain two improvements to the student’s method that would help to increase the accuracy of the results. 1 2 [2]
  8. June 2024, Biology Paper 5 Higher, Q6(c) (3 marks): The milk went clear and colourless fastest at 40 °C. Explain why some washing powders containing trypsin are recommended to be used at 40 °C. Use ideas about en
  9. June 2023, Biology Paper 1 Foundation, Q11(b)(iii) (2 marks): The student concludes that their normal blood sugar level is 105 mg / 10 cm3. Describe evidence from the graph that supports this conclusion. [2]
  10. June 2023, Biology Paper 5 Higher, Q2(b)(iii) (2 marks): The student concludes that their normal blood sugar level is 105 mg / 10 cm3. Describe evidence from the graph that supports this conclusion. [2]
  11. June 2022, Biology Paper 5 Higher, Q7(e) (2 marks): Explain why it is important that responses such as sweating reduce the temperature of the body and its cells back to normal. [2]
  12. June 2022, Biology Paper 5 Higher, Q9(c) (4 marks): Explain the role of the hormone thyroxine in the body. Include the role of negative feedback in your answer. [4]
  13. November 2021, Biology Paper 1 Foundation, Q1(a) (1 mark): What is this process called? Tick (✓) one box. Homeostasis Homozygous Homologous Hormonal [1]
  14. November 2021, Biology Paper 1 Foundation, Q1(b) (1 mark): The human body maintains an internal temperature of around 37 °C. Why is it important that this temperature is maintained? Tick (✓) one box. Enzymes in the huma
  15. June 2019, Combined Science Paper 4 Foundation, Q4(a)(i) (2 marks): Complete the flow diagram, describing this process. Use words from the list. You may use each word once, more than once or not at all. muscle sensory receptor m
  16. June 2019, Combined Science Paper 4 Foundation, Q4(a)(ii) (2 marks): Explain why our body temperature needs to be maintained around 37 °C. [2]
  17. June 2019, Combined Science Paper 4 Foundation, Q4(a)(iv) (2 marks): Temperature regulation is an example of homeostasis. Which other processes in humans are maintained by homeostasis? Tick (✓) two boxes. Absorption of oxygen in
  18. June 2019, Combined Science Paper 8 Higher, Q4(a) (3 marks): Kai says that galagos regulate their body temperature by a process called homeostasis. Explain why it is important that a galago maintains a body temperature of
  19. June 2019, Combined Science Paper 8 Higher, Q4(c)(i) (2 marks): Shivering is a response to being cold. Use Fig. 4.2 to suggest when and why the galago is most likely to shiver. [2]

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