plumiNegative and positive feedback: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 7.4.1 Negative and positive feedback, 2019–2025, with mark schemes and examiner’s reports where available.
All papers
All years
Q5(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ5(b)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ3(b)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ3(b)(ii)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ8(d)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ8(e)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ7(c)
The whole paper ↗Loading the question…
Open the full PDFQ3(a)(iii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ4(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ4(d)(i)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ4(d)(ii)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDF
All 11 questions on Negative and positive feedback, as a list
- January 2025, Unit 5, Q5(a) (1 mark): State what is meant by the term homeostasis. (1)
- January 2025, Unit 5, Q5(b) (3 marks): The insulin concentration in blood is affected by many variables. The effect of exercise on the concentration of insulin in the blood of trained and untrained i
- October 2024, Unit 5, Q3(b)(i) (1 mark): Name the type of process involved in maintaining calcium ion concentrations within this range. (1)
- October 2024, Unit 5, Q3(b)(ii) (2 marks): The calcium ion concentration in the blood is kept within a range of 6% above and below the mean concentration. The mean calcium ion concentration in the blood
- January 2024, Unit 5, Q8(d) (2 marks): Insulin control of blood glucose is an example of a negative feedback loop (paragraph 7). Explain how negative feedback can maintain a system within a narrow li
- January 2024, Unit 5, Q8(e) (2 marks): Suggest how insulin increases the uptake of glucose by muscle cells (paragraph 7). (2)
- January 2023, Unit 5, Q7(c) (6 marks): Negative feedback is involved in maintaining systems within narrow limits. The blood glucose concentration has to be maintained within narrow limits. Insulin an
- June 2022, Unit 5, Q3(a)(iii) (1 mark): The control of plasma concentration and blood volume in the body is an example of which type of process? (1) A countercurrent multiplier B habituation C negativ
- October 2021, Unit 5, Q4(a) (2 marks): Feedback mechanisms are involved in maintaining homeostasis. Describe the difference between a negative feedback mechanism and a positive feedback mechanism. (2
- October 2021, Unit 5, Q4(d)(i) (3 marks): Comment on the results of this trial. (3)
- October 2021, Unit 5, Q4(d)(ii) (2 marks): Calculate the difference that surgery makes to the mean uptake of glucose in the non‑diabetic group and the type II diabetic group. (2) Answer
Questions, mark schemes and examiner’s reports are © Pearson Edexcel, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Edexcel International A Level Biology past papers.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.