Two groups of adults complete a coordination test. Each adult stands on a pressure-sensitive platform and touches a bright target on a screen as soon as it appears. Group B have damage to the same region of the brain.
| Group | Mean reaction time in seconds | Mean distance from centre of target in cm | Mean number of touches, out of 20, that required a step to regain balance |
|---|---|---|---|
| A: no brain damage | 0.22 | 1.3 | 0.8 |
| B: brain damage | 0.23 | 8.8 | 11.6 |
Use the results and your knowledge of the nervous system to describe how the response is coordinated and identify the region of the brain that is most likely to be damaged in group B.
135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.