Coordination and response — Paper 1 · IGCSE Biology (9-1) 0970

23 Which are effectors? A brain and spinal cord B muscles and glands C receptors D sensory neurones and motor neurones

1 marks

Answer: B

This question in 0970/11 May/June 2018

22 The diagram shows a reflex arc. Which label points to the sensory neurone? A B C D hot pan

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2018

23 What does the central nervous system consist of? A brain, spinal cord and peripheral nerves B brain and spinal cord only C brain only D spinal cord and peripheral nerves only

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2018

26 The diagram shows a simple reflex arc. Which labelled part is the sensory neurone? C B A D

1 marks

Answer: B

This question in 0970/11 May/June 2019

11 In which situation would insulin secretion usually increase? A after eating a meal B hearing a loud bang immediately behind you C listening to music D reading a book

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2019

22 The diagram shows a simple reflex arc. 2 sensory neurone 3 activated muscle stimulated 4 receptor stimulated knee tapped here 1 motor neurone activated What is the correct order of events after the knee is tapped? A 1 → 2 → 3 → 4 B 1 → 4 → 2 → 3 C 4 → 2 → 1 → 3 D 4 → 3 → 2 → 1

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2019

23 The diagram shows the eye of a person in a brightly-lit room. P Q What happens to distance P and distance Q when this person moves from the brightly-lit room into a dark room? distance P distance Q A decreases increases B decreases stays the same C increases decreases D stays the same increases

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2019

1 The diagram shows what happened in an experiment with plant seedlings. start next day light light Which characteristic of living things made the seedlings grow towards the light? A excretion B nutrition C respiration D sensitivity

1 marks

Answer: D

This question in 0970/11 May/June 2020

22 What is the function of the optic nerve? A to carry impulses from the brain to the retina B to carry impulses from the retina to the brain C to carry light from the brain to the retina D to carry light from the retina to the brain

1 marks

Answer: B

This question in 0970/11 May/June 2020

1 The diagram shows what happened in an experiment with plant seedlings. start next day light light Which characteristic of living things made the seedlings grow towards the light? A excretion B nutrition C respiration D sensitivity

1 marks

Answer: D

This question in 0970/12 May/June 2020

22 Which structure transfers information to the central nervous system? A effector B motor neurone C relay neurone D sensory neurone

1 marks

Answer: D

This question in 0970/12 May/June 2020

25 Which structure contains relay neurones? A gland B muscle C spinal cord D synapse

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2020

26 A man injures his arm in an accident. Afterwards, he can move his hand but cannot feel objects touching his hand. What could cause this? A Both sensory and motor neurones are cut. B Effectors are damaged. C Motor neurones are cut. D Sensory neurones are cut.

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2020

27 What are the effects of adrenaline on the human body? breathing rate pulse rate size of pupils A decreased decreased decreased B decreased decreased increased C increased increased decreased D increased increased increased

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2020

26 What is the sequence of neurones connecting a receptor to an effector in a reflex arc? A motor  relay  sensory B motor  sensory  relay C sensory  motor  relay D sensory  relay  motor

1 marks

Answer: D

This question in 0970/11 May/June 2021

27 What controls how much light enters the eye? A B D C

1 marks

Answer: B

This question in 0970/11 May/June 2021

26 The structures listed are part of the nervous system. 1 brain 2 effector 3 receptor 4 relay neurone In a reflex arc, which structures are connected to a motor neurone by synapses? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2021

27 A student investigated the effect of changing light intensity on pupil diameter in the eye. The table shows the results. starting pupil diameter final pupil diameter / mm / mm 8 2 Which explanation for the student’s results is correct? A A reduced light intensity reduced the pupil diameter by 75%. B A reduced light intensity reduced the pupil diameter by 25%. C An increased light intensity reduced the pupil diameter by 75%. D An increased light intensity reduced the pupil diameter by 25%.

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2021

26 Which hormone triggers the ‘fight or flight’ response? A testosterone B oestrogen C adrenaline D insulin

1 marks

Answer: C

This question in 0970/11 May/June 2022

27 Which organ detects and coordinates the response to changes in internal body temperature? A brain B heart C liver D skin

1 marks

Answer: A

This question in 0970/11 May/June 2022

29 Why is excessive consumption of alcohol discouraged before someone operates machinery or drives a vehicle? A Alcohol decreases reaction times. B Alcohol increases reaction times. C Alcohol is a stimulant drug. D Alcohol is an addictive drug.

1 marks

Answer: B

This question in 0970/11 May/June 2022

26 The diagram shows a simple reflex arc. spinal cord P What is the function of the part labelled P? A passing impulses to the central nervous system B passing impulses to the effector C passing impulses to the receptor D passing impulses to the sensory neurone

1 marks

Answer: B

This question in 0970/12 May/June 2022

27 Which hormone causes an increase in breathing rate, an increase in heart rate and the widening of pupils? A insulin B adrenaline C oestrogen D testosterone

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2022

27 What is the name of the junction between two neurones? A effector B receptor C gland D synapse

1 marks

Answer: D

This question in 0970/11 May/June 2023

28 Which statement about adrenaline is correct? A It decreases the heart rate. B It decreases the diameter of the pupil. C It increases the breathing rate. D It is made in the pancreas.

1 marks

Answer: C

This question in 0970/11 May/June 2023

29 Which words complete the statements? Plant growth towards light is called … 1 … . When a plant shoot grows towards a light source, it is showing a … 2 … to light. Light acts as the … 3 … . 1 2 3 A movement response stimulus B movement stimulus response C phototropism response stimulus D phototropism stimulus response

1 marks

Answer: C

This question in 0970/11 May/June 2023

26 The diagram shows the structures in a reflex arc. X receptor muscle What is X? A effector B relay neurone C sensory neurone D synapse

1 marks

Answer: B

This question in 0970/12 May/June 2023

26 The diagram shows a reflex arc in a human nervous system. The person’s finger has just made contact with a sharp object. Which part is the motor neurone? A B C D

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2023

27 Which lines on the graphs show the effects of adrenaline on pupil diameter and heart rate? W Y pupil heart diameter rate X Z time time adrenaline is released adrenaline is released A W and Y B W and Z C X and Y D X and Z

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2023

28 The diagram shows an iris and a pupil in different light conditions. iris pupil light dark Which characteristic of living organisms is this an example of? A growth B movement C excretion D sensitivity

1 marks

Answer: D

This question in 0970/11 May/June 2024

26 Which row shows the effects of adrenaline secretion? pupil diameter heart rate A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: D

This question in 0970/12 May/June 2024

2 A student exposed a fly larva to light and temperature gradients. They lit the area from one side and made one side of the area warmer than the other. They traced the path of the fly larva’s movement. warm fly larva light dark cold path taken by the fly larva Which statement describes the response of the fly larva? A The fly larva does not respond to temperature or light intensity. B The fly larva moves away from a higher temperature and a higher light intensity. C The fly larva moves away from a higher temperature and towards a higher light intensity. D The fly larva moves towards a higher temperature and away from a higher light intensity.

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2024

27 What is the pathway of a reflex arc from the receptor to the effector? A motor neurone  relay neurone  sensory neurone B motor neurone  sensory neurone  relay neurone C sensory neurone  motor neurone  relay neurone D sensory neurone  relay neurone  motor neurone

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2024

1 The diagram shows how a seed changes after it is planted in soil and watered. Which characteristics of living things are demonstrated by the sequence shown in the diagram? A growth only B growth and sensitivity C nutrition and reproduction D reproduction and sensitivity

1 marks

Answer: B

This question in 0970/11 May/June 2025

25 The diagram shows a reflex arc. Q P R Which letters on the diagram represent the relay neurone and the sensory neurone? relay neurone sensory neurone A P Q B P R C Q R D Q P

1 marks

Answer: D

This question in 0970/11 May/June 2025

23 A person touches a hot object which stimulates structure P in the skin. This causes an electrical impulse to be sent through structure Q to the central nervous system. Which row identifies structures P and Q? P Q A effector motor neurone B effector sensory neurone C receptor motor neurone D receptor sensory neurone

1 marks

Answer: D

This question in 0970/12 May/June 2025

19 The diagram shows the pathway of a reflex arc. stimulus V W relay neurone response Y X Which row identifies the parts of the reflex arc? V W X Y A effector motor neurone sensory neurone receptor B effector sensory neurone motor neurone receptor C receptor motor neurone sensory neurone effector D receptor sensory neurone motor neurone effector

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2025

20 A person is being chased. This causes a hormone to be released. Which row shows how this hormone affects the breathing rate, heart rate and pupil diameter? breathing rate heart rate pupil diameter A increases increases increases B increases decreases decreases C decreases increases increases D decreases decreases decreases

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2025