plumiWhy do we need to maintain a constant internal environment?: OCR GCSE Biology B questions
Every OCR GCSE Biology 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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Q6(a)(i)
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Q6(a)(ii)
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Q9(a)
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Q9(b)(i)
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The whole paper ↗Q6(b)
The whole paper ↗Q6(c)
The whole paper ↗Q6(a)(i)
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Q6(a)(ii)
The whole paper ↗Q6(b)
The whole paper ↗Q7(a)
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Q7(b)
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All 47 questions on Why do we need to maintain a constant internal environment?, as a list
- June 2025, Paper 1 Foundation, Q6(a)(i) (2 marks): Complete the sentence to explain what happens to body cells if the blood plasma becomes too concentrated. Use words from the list. active transport burst into o
- June 2025, Paper 1 Foundation, Q6(a)(ii) (1 mark): Suggest what can cause blood plasma to become too concentrated. [1]
- June 2025, Paper 1 Foundation, Q6(b)(i) (1 mark): State the name of one other substance filtered from the blood by the kidneys. [1]
- June 2025, Paper 1 Foundation, Q6(b)(ii) (2 marks): Kidneys filter around 180 litres of blood plasma a day. The volume of blood plasma in an average person is approximately 3 litres. Calculate how many times per
- June 2025, Paper 3 Higher, Q6(b) (2 marks): One symptom of decreasing hormone levels in female humans is hot flushes. This is a sudden increase in the temperature of the skin. Suggest how the body tries t
- June 2024, Paper 1 Foundation, Q9(a) (1 mark): Why would it be helpful to know what their dog’s normal body temperature is? [1]
- June 2024, Paper 1 Foundation, Q9(b)(i) (3 marks): An owner measures their dog’s temperature 3 times. Temperature (°C) 1 38.7 2 38.9 3 38.7 Calculate the mean body temperature. Give your answer to 1 decimal plac
- June 2024, Paper 1 Foundation, Q9(b)(ii) (1 mark): Why is it sensible to measure the dog’s temperature a few times and then calculate the mean? [1]
- June 2024, Paper 1 Foundation, Q9(c) (2 marks): Dog owners are advised to take their dog to the vet if its temperature is consistently over 40 °C. A different owner is worried about their dog. They measure th
- June 2024, Paper 1 Foundation, Q9(d) (2 marks): In hot weather dogs find it difficult to cool down. Explain why this could be harmful to the dog’s health. [2]
- June 2024, Paper 3 Higher, Q3(a) (4 marks): Sam is visiting Norway where the average temperature in the winter is –6.8 °C. Sam steps outside the hotel wearing only a jumper. Complete the sentences to desc
- June 2024, Paper 3 Higher, Q3(b) (3 marks): Which method of cooling the human body would be the least effective in a hot humid environment? Explain your answer. Method Explanation [3]
- June 2024, Paper 3 Higher, Q3(c) (2 marks): Explain the importance of maintaining a constant internal temperature. [2]
- June 2024, Paper 3 Higher, Q6(b) (2 marks): ADH is a hormone that controls the water balance in the body. Draw lines to connect each question with the correct answer. Cerebellum Which structure releases A
- June 2024, Paper 3 Higher, Q6(c) (3 marks): What effect will body fluids that contain too much water have on cells? [3]
- June 2023, Paper 1 Foundation, Q6(a)(i) (3 marks): Describe a method the student could use to investigate the effect that the surrounding water temperature has on the temperature of the red liquid in the test tu
- June 2023, Paper 1 Foundation, Q6(a)(ii) (1 mark): Describe one thing the student should control in the method described in (a)(i). [1]
- June 2023, Paper 1 Foundation, Q6(b) (1 mark): Why is a test tube of liquid not a good model of the human body? [1]
- June 2023, Paper 1 Foundation, Q7(a) (3 marks): The table shows the amounts of water gained and lost from one person in one day. Volume of water gained (ml) Volume of water lost (ml) From drinks 1200 From lun
- June 2023, Paper 1 Foundation, Q7(b) (3 marks): Complete the sentences to explain why it is important to control the amount of water in the blood. Use words from the list. active transport burst diffusion ful
- June 2022, Paper 1 Foundation, Q4(d) (1 mark): An organ that removes water and urea from the blood. [1]
- June 2022, Paper 1 Foundation, Q6(a) (1 mark): Which word describes the maintenance of a constant internal environment? Put a ring around the correct answer. active transport homeostasis osmosis respiration
- June 2022, Paper 1 Foundation, Q6(b)(i) (1 mark): Use the data in the table to work out the normal body temperature range of these elephants. Normal body temperature range = to °C [1]
- June 2022, Paper 1 Foundation, Q6(b)(ii) (2 marks): Calculate the mean body temperature of the five elephants. Give your answer to one decimal place. Mean body temperature = °C [2]
- June 2022, Paper 1 Foundation, Q6(c)(i) (1 mark): Elephants live in hot climates and have very few sweat glands. They find it difficult to lose heat. Which statement explains why elephants find it difficult to
- June 2022, Paper 1 Foundation, Q6(c)(ii) (1 mark): Suggest one way elephants can reduce their body temperature. [1]
- June 2022, Paper 3 Higher, Q9(a) (1 mark): Which statement explains why elephants find it difficult to regulate their body temperature? Tick (3) one box. Elephants have a fast heart rate. Elephants have
- June 2022, Paper 3 Higher, Q9(b) (3 marks): The normal body temperature of an elephant is 35.9 °C. Does the graph provide evidence for heterothermy in elephants? Explain your answer. [3]
- June 2022, Paper 3 Higher, Q9(c)(i) (2 marks): Describe one method that both elephants and humans use to regulate their temperature. [2]
- June 2022, Paper 3 Higher, Q9(c)(ii) (3 marks): Describe how the human body monitors its temperature. [3]
- November 2021, Paper 1 Foundation, Q1(b)(i) (1 mark): Which organ is responsible for maintaining the water balance of the human body? Put a ring around the correct answer. Heart Kidney Skin Stomach [1]
- November 2021, Paper 1 Foundation, Q1(b)(ii) (2 marks): State two ways in which the human body loses water. 1 2 [2]
- November 2021, Paper 1 Foundation, Q4(b)(ii) (2 marks): A Salmonella infection can cause the body’s temperature to rise higher than normal. Describe two changes that will take place in the skin to help bring the body
- November 2021, Paper 3 Higher, Q4(d) (1 mark): A human hormone that increases the permeability of the kidney tubule. [1]
- November 2021, Paper 4 Higher, Q5(a) (2 marks): Fig. 5.1 shows two thermometers they could use to measure Beth’s temperature. 40 36.55 °C 30 Glass thermometer Digital thermometer Fig. 5.1 They plan to use the
- November 2021, Paper 4 Higher, Q5(b) (1 mark): Fig. 5.2 shows the data they collected using a digital thermometer. Period A Period B Period C (Resting) (Exercise) (Resting) 38.0 37.5 Beth's body temperature
- November 2021, Paper 4 Higher, Q5(c)(i) (1 mark): Give one way in which the results in Fig. 5.2 support the prediction. [1]
- November 2021, Paper 4 Higher, Q5(c)(ii) (1 mark): Give one way in which the results in Fig. 5.2 do not support the prediction. [1]
- November 2021, Paper 4 Higher, Q5(c)(iii) (1 mark): How could Beth and Leo increase their confidence in their prediction? [1]
- November 2021, Paper 4 Higher, Q5(e) (6 marks): Beth and Leo plan to investigate the effect of exercise on body temperature. Beth will exercise for 30 minutes. Leo will measure Beth’s body temperature before,
- November 2020, Paper 4 Higher, Q6 (6 marks): 6* Alex has not had a drink of water for some time. This means there is less water in his blood. Describe how Alex’s body detects and responds to this, and how
- June 2019, Paper 2 Foundation, Q1(a) (4 marks): Complete the table to describe how structures in the skin help to cool you down when you are too hot. Structure What the structure does Appearance of skin Sweat
- June 2019, Paper 2 Foundation, Q1(b)(i) (2 marks): The hairs on his skin are standing on end. Explain how this helps to warm him up. [2]
- June 2019, Paper 2 Foundation, Q1(b)(ii) (2 marks): James starts to shiver. Shivering happens because muscles are contracting rapidly. Explain how this helps to warm him up. [2]
- June 2019, Paper 4 Higher, Q7(a)(i) (3 marks): Use the graph to explain why it is important for the human body to maintain a constant internal temperature of 37 °C. [3]
- June 2018, Paper 3 Higher, Q5(b)(iv) (3 marks): Why is a high temperature in the human body a problem? [3]
- June 2018, Paper 4 Higher, Q5(b) (6 marks): The human body responds to changes so that it can maintain a constant internal environment. (b)* When temperature receptors in the skin and hypothalamus detect
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