Homeostasis — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

3 The graph shows the change in blood glucose level in a healthy man. Which arrow identifies when the pancreas first starts to release glucagon? B blood glucose A level normal blood glucose level C D time

1 marks

Answer: D

This question in 0654/21 May/June 2017

8 The diagram shows a section through human skin. Which structure undergoes vasodilation to increase heat loss from the skin? B C epidermis dermis D fat A

1 marks

Answer: A

This question in 0654/22 May/June 2017

1 What is homeostasis? A the maintenance of the body’s external environment B the maintenance of the body’s internal environment C the processes that produce heat in the body D the removal of wastes from the body

1 marks

Answer: B

This question in 0654/21 Oct/Nov 2017

2 What is excretion? A breakdown of materials in kidney cells B chemical reactions in liver cells C removal of undigested food from the gut D removal of waste products

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2017

1 What is homeostasis? A the maintenance of the body’s external environment B the maintenance of the body’s internal environment C the processes that produce heat in the body D the removal of wastes from the body

1 marks

Answer: B

This question in 0654/22 Oct/Nov 2017

2 What is excretion? A breakdown of materials in kidney cells B chemical reactions in liver cells C removal of undigested food from the gut D removal of waste products

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2017

1 What is homeostasis? A the maintenance of the body’s external environment B the maintenance of the body’s internal environment C the processes that produce heat in the body D the removal of wastes from the body

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2017

2 What is excretion? A breakdown of materials in kidney cells B chemical reactions in liver cells C removal of undigested food from the gut D removal of waste products

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2017

8 During vigorous exercise there is an increase in the rate of breathing. What causes the increase in the rate of breathing? A a decrease in the adrenaline concentration in the blood B a decrease in the lactic acid concentration in the blood C an increase in the alcohol concentration in the blood D an increase in the carbon dioxide concentration in the blood

1 marks

Answer: D

This question in 0654/21 May/June 2019

9 Which statement about the role of blood vessels in the skin is correct? A If the environment is too cold, vasoconstriction of capillaries occurs. B If the environment is too cold, vasodilation of arterioles occurs. C If the environment is too hot, vasoconstriction of capillaries occurs. D If the environment is too hot, vasodilation of arterioles occurs.

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2019

9 What happens when the body temperature falls below normal? A Arterioles supplying the skin constrict. B Arterioles supplying the skin dilate. C Capillaries move towards the skin surface. D Capillaries move away from the skin surface.

1 marks

Answer: A

This question in 0654/21 May/June 2020

9 What happens when the body temperature falls below normal? A Arterioles supplying the skin constrict. B Arterioles supplying the skin dilate. C Capillaries move towards the skin surface. D Capillaries move away from the skin surface.

1 marks

Answer: A

This question in 0654/22 May/June 2020

9 What happens when the body temperature falls below normal? A Arterioles supplying the skin constrict. B Arterioles supplying the skin dilate. C Capillaries move towards the skin surface. D Capillaries move away from the skin surface.

1 marks

Answer: A

This question in 0654/23 May/June 2020

9 What is homeostasis? A keeping internal conditions constant B keeping the body at the same temperature as the environment C sweating to keep the body warm D vasoconstriction of arterioles to increase heat loss

1 marks

Answer: A

This question in 0654/21 May/June 2021

9 Adrenaline increases blood glucose concentration. It does this by changing the levels of glucagon and insulin. Which row is correct? adrenaline level glucagon level insulin level A decrease decrease decrease B decrease increase decrease C increase increase increase D increase increase decrease

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2021

9 The diagram shows a section through the skin. 1 4 2 3 Which labelled structures help to maintain body temperature in the cold? A 1 and 3 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: A

This question in 0654/22 Feb/March 2022

9 The graph shows the changes in blood glucose concentration during two hours of exercise. 5.6 5.5 5.4 blood glucose 5.3 concentration 5.2 / mmol per dm3 5.1 5.0 4.9 0 20 40 60 80 100 120 time / min What causes the change in blood glucose concentration between 30 and 60 min? 1 increased adrenaline release 2 increased glucagon release 3 increased insulin release A 1 only B 1 and 2 C 1 and 3 D 2 only

1 marks

Answer: B

This question in 0654/21 May/June 2022

9 Which statement about temperature control is correct? A Vasoconstriction near the skin surface and shivering will cool the body down. B Vasoconstriction near the skin surface and sweating will warm the body up. C Vasodilation near the skin surface and shivering will warm the body up. D Vasodilation near the skin surface and sweating will cool the body down.

1 marks

Answer: D

This question in 0654/23 May/June 2022

9 The graph shows the variation of body temperature over time of a healthy person at rest. 38 Y body temperature 37 / °C X 36 time How will the body reverse the temperature change shown between times X and Y? A decreased breathing rate B decreased pulse rate C shivering D sweating

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2022

8 During cold weather, warm blooded animals, such as mammals and birds, require more food. Which statement explains the reason for this? energy required to rate of maintain constant respiration body temperature A high high B high low C low high D low low

1 marks

Answer: A

This question in 0654/22 May/June 2023

9 Which statement about the role of blood vessels in the skin is correct? A If the environment is too cold, vasoconstriction of capillaries occurs. B If the environment is too cold, vasodilation of arterioles occurs. C If the environment is too hot, vasoconstriction of capillaries occurs. D If the environment is too hot, vasodilation of arterioles occurs.

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2023

9 The arterioles that supply blood to the skin's surface capillaries undergo vasodilation. Which row describes the effect of this on the core body temperature and the volume of blood passing through these capillaries? core body volume of temperature blood A decreases decreases B increases decreases C decreases increases D increases increases

1 marks

Answer: C

This question in 0654/23 May/June 2024

8 Changes in the body occur as a result of increased physical activity. increased increased effect effect physical respiration R S activity in cells What are effects R and S? effect R effect S A decrease in blood carbon dioxide decrease in breathing rate B decrease in blood lactic acid increase in breathing rate C increase in blood carbon dioxide increase in breathing rate D increase in blood lactic acid decrease in breathing rate

1 marks

Answer: C

This question in 0654/22 Oct/Nov 2024

8 Which row names a hormone, the organ that produces it and the hormone’s effect on blood glucose concentration? effect on hormone produced by blood glucose concentration A glucagon liver decreases B glucagon pancreas increases C insulin liver decreases D insulin pancreas increases

1 marks

Answer: B

This question in 0654/22 Feb/March 2025

11 What is homeostasis? A the maintenance of the body’s external environment B the maintenance of the body’s internal environment C the processes that produce heat in the body D the removal of waste from the body

1 marks

Answer: B

This question in 0654/22 Feb/March 2025

10 The homeostatic control of body temperature is shown. constant internal increase in body constant internal X body temperature temperature body temperature Which processes happen at X? A vasodilation and increased shivering B vasodilation and increased sweating C vasoconstriction and increased shivering D vasoconstriction and increased sweating

1 marks

Answer: B

This question in 0654/22 May/June 2025

7 What is the role of glucagon? A decrease blood glucose B decrease blood insulin C increase blood glucose D increase blood insulin

1 marks

Answer: C

This question in 0654/23 May/June 2025

10 A man eats a meal high in carbohydrates. There is only a small change in his blood glucose concentration. Which statement explains why? A The pancreas releases insulin and this causes the excess glucose to be stored as glucagon. B The pancreas releases insulin and this causes the excess glucose to be stored as glycogen. C The pancreas releases glucagon and this causes the excess glucose to be stored as glycogen. D The pancreas releases glucagon and this causes the excess glucose to be stored as insulin.

1 marks

Answer: B

This question in 0654/21 Oct/Nov 2025

10 Which statement about blood flow to the skin in the maintenance of a constant internal body temperature is correct? A If the internal body temperature is too high then vasoconstriction of skin arterioles occurs. B If the internal body temperature is too low then vasoconstriction of skin capillaries occurs. C If the internal body temperature is too high then vasodilation of skin arterioles occurs. D If the internal body temperature is too low then vasodilation of skin capillaries occurs.

1 marks

Answer: C

This question in 0654/22 Oct/Nov 2025