Doc Brown's GCSE OCR 21st Century Science-Biology Revision Notes

PLEASE NOTE NEW revision summaries for the NEW OCR 21st Century Science B GCSE Biology B and NEW OCR GCSE 21st Century Combined Science B Biology courses: Revision for Chapters 1-3) and  Paper 2 (Chapters 4-6) STARTING with Y10 in Sept. 2016 onwards, first exams in 2018

OCR GCSE 21st Century Additional Science Biology Module B6 Brain and mind

B6.1 How do animals respond to changes in their environment?

  • 1. know that a stimulus is a change in the environment of an organism

  • 2. understand that simple reflexes produce rapid involuntary responses to stimuli

  • 3. understand that the simplest animals rely on reflex actions for the majority of their behaviour

  • 4. understand that these reflex actions help to ensure that the simplest animals respond to a stimulus in a way that is most likely to result in their survival, to include finding food and sheltering from predators

  • 5. know examples of simple reflexes in humans, to include newborn reflexes (eg stepping, grasping, sucking), pupil reflex, knee jerk and dropping a hot object

  • 6. understand that nervous co-ordination, including simple reflexes, requires:

    • a) receptors to detect stimuli

    • b) processing centres to receive information and coordinate responses

    • c) effectors to produce the response

  • 7. understand that receptors and effectors can form part of complex organs, for example:

    • a) light receptor cells in the retina of the eye

    • b) hormone secreting cells in a gland

    • c) muscle cells in a muscle

  • 8. understand that nervous systems use electrical impulses for fast, short-lived responses including simple reflexes

  • 9. know that hormones are chemicals that are produced in glands, travel in the blood and bring about slower, longer-lasting responses, eg insulin and oestrogen

  • 10. know that the development of nervous and hormonal communication systems depended on the evolution of multicellular organisms.




  • OCR GCSE Twenty First Century Additional Science BIOLOGY Module B6 Brain and mind

  • When revising, these pages provide you with a summary of what you need to know and be able to do.

  • BUT remember, your primary source of revision are your class notes, investigations and OCR 21st C GCSE science textbooks and classwork worksheets as well as examination practice with past papers.

  • PLEASE NOTE My NEW GCSE (9-1) BIOLOGY REVISION SUMMARIES for Y10 2016-2017 onwards

    AQA GCSE Biology 8461  1st Paper (Topics 1-4 & Combined Science Trilogy Biology 1 Topics 1-4)

    AQA GCSE Biology 8461  2nd Paper (Topics 5-7 & Combined Science Trilogy Biology 2 Topics 5-7)

    Edexcel GCSE (9-1) Biology 1st Paper (Topics 1-5 & Combined Science Biology 1 Topics 1-5)

    Edexcel GCSE (9-1) Biology 2nd Paper (Topics 1, 6-9 & Combined Science Biology 2 Topics 1, 6-9)

    OCR (9-1) Gateway Science GCSE Biology A 1st Paper (Topics B1-3 & Combined Science A Biology 1 Topics B1-3)

    OCR (9-1) Gateway Science GCSE Biology A 2nd Paper (Topics B4-6 & Combined Science A Biology 1 Topics B4-6)

    OCR (9-1) 21st Century Science GCSE Biology B Chapters B1-3 (Chapters B1-3, GCSE Combined Science B biology)

    OCR (9-1) 21st Century Science GCSE Biology B Chapters B4-6 (Chapters B4-6, GCSE Combined Science B biology)

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