B1.2 The nervous system GCSE items that can be used to define successful outcomes for peer and self assessment activities • B1.2 The nervous system Using Exam pro items to support successful outcomes Learners will be able to test their progress against learning outcomes using questions taken from past AQA GCSE examinations. Version 2.0 Copyright © AQA and its licensors. All rights reserved. • B1.2 The Nervous System June 2012 BL1FPJune 12 The nervous system allows humans to react to their surroundings. (a) Sense organs have receptors. Receptors detect changes in the environment. Which word describes a change in the environment? Underline one answer. an effector a neurone a stimulus (1 mark) Version 2.0 Copyright © AQA and its licensors. All rights reserved. • B1.2 The Nervous System June 2012 BL1FP 1 (b) The photograph shows a baby. Labels A, B, C, D and E show some of the baby’s sense organs. B A E D C Version 2.0 Copyright © AQA and its licensors. All rights reserved. • B1.2 The Nervous System June 2012 BL?? Answer each question by writing one letter, A, B, C, D or E, in each box. 1 (b) (i) Which sense organ has receptors sensitive to light? (1 mark) 1 (b) (ii) Which two sense organs have receptors sensitive to chemicals? and (2 marks) 1 (b) (iii) Which sense organ has receptors sensitive to changes in the baby’s position? (1 mark) Version 2.0 Copyright © AQA and its licensors. All rights reserved. • B1.2 The Nervous System June 2012 BL1FP 1 (c) Information from sense organ A is passed along nerve cells. The information is coordinated to produce a response. Which organ in the body coordinates the information? ............................................................................................................. ..................... (1 mark) Version 2.0 Copyright © AQA and its licensors. All rights reserved. • Mark scheme (a) (b)(i) (b)(ii) (b)(iii) (c) a stimulus 1 A1 CD either order 2 E1 G brain allow spinal cord / CNS / central nervous system do not allow spine 1 Total 6 Version 2.0 Copyright © AQA and its licensors. All rights reserved. B1.2 The Nervous System June 2012 BL1FPQ1 • B1.2 The Nervous System June 2012BL1HP Higher The diagram shows the nervous pathway used to coordinate the knee-jerk reflex. When the person is hit at point P, the lower leg is suddenly raised. Version 2.0 Copyright © AQA and its licensors. All rights reserved. • B1.2 The Nervous System June 2012BL1HP (a) Name neurones A, B and C. A ............................................................................................................... ..... B ……………............................................................................................. ......... C ............................................................................................................... ...... (3 marks) (b) The receptor in the muscle in the leg is sensitive to a stimulus. Suggest the stimulus. Version 2.0 Copyright © AQA and its licensors. All rights reserved. ............................................................................................................... • B1.2 The Nervous System June 2012BL1HP (c) Describe what happens at the synapse during this reflex. ……………………………………………………………………… ………………………………… ……………………………………………………………………… ………………………………… ……………………………………………………………………… ………………………………… ……………………………………………………………………… ………………………………… ……………………………………………………………………… ………………………………… ……………………………………………………………………… ………………………………… Version 2.0 Copyright © AQA and its licensors. All rights reserved. • (a) B1.2 The Nervous System June 2012 Mark scheme (c) any three from: A sensory 1 chemical (release) B motor 1 C relay 1 diffuses (across the gap /synapse) transmits impulse /information (across synapse)between neurones / nerve cells / namedaccept neurotransmitter /acetylcholineallow transmits signal / message ignore nerve / neuron(e) throughout accept afferent accept efferent if named, must be either sensory /A to relay / C or relay / C to motor/ B allow ‘to the next neurone’ accept intermediate 3 (b) stretch allow pressure / pull / tension (in Total 7 muscle) 1 allow a hit at (point) P ignore pain Version 2.0 Copyright © AQA and its licensors. All rights reserved.