Contents
Key Stage 3
Meaning
The nervous system is an organ system which detects changes in the environment and allows the body to respond to those changes.
About the Nervous System
- The nervous system is made of the brain, the nerves and the sensory organs.
- Drugs can affect the nervous system changing they way an animal senses changes in the environment and how quickly they can respond to them.
Key Stage 4
Meaning
The Nervous System is an organ system which sends electrical impulses around the body to detect changes in the environment and respond to those changes.
About the Nervous System
- The nervous system consists of the Central Nervous System (made of the brain and spinal cord and the Peripheral Nervous System (the other nerve and the sense organs).
- The nervous system coordinates movements of an organism.
- Stimulants affect the nervous system by increasing the speed of electrical impulses in the nerves. This decreases reaction time.
- Depressants affect the nervous system by decreasing the speed of electrical impulses in the nerves. This increases reaction time.
References
AQA
- Nervous system, pages 1, 2, GCSE Combined Science Trilogy 2, Hodder, AQA
- Nervous system, pages 131-47, GCSE Biology, Hodder, AQA
- Nervous system, pages 172, 173, 182, 183, GCSE Combined Science Trilogy; Biology, CGP, AQA
- Nervous system, pages 186, 187, 208, 209, GCSE Biology, CGP, AQA
- Nervous system, pages 58, 59, GCSE Combined Science; The Revision Guide, CGP, AQA
- Nervous system, pages 66, 67, GCSE Biology; The Revision Guide, CGP, AQA
- Nervous system; Generating electrical impulses, pages 3, GCSE Combined Science Trilogy 2, Hodder, AQA
- Nervous system; Neurone types, pages 4, GCSE Combined Science Trilogy 2, Hodder, AQA
- Nervous system; Reaction times investigation, pages 6-7, GCSE Combined Science Trilogy 2, Hodder, AQA
- Nervous system; Receptors, pages 3-4, GCSE Combined Science Trilogy 2, Hodder, AQA
- Nervous system; Reflex arcs, pages 5-6, GCSE Combined Science Trilogy 2, Hodder, AQA
- Nervous system; Synapses, pages 5, GCSE Combined Science Trilogy 2, Hodder, AQA
Edexcel
- Nervous system, page 28, GCSE Biology; The Revision Guide, CGP, Edexcel
- Nervous system, pages 34-35, GCSE Combined Science, Pearson Edexcel
- Nervous system, pages 42-43, GCSE Biology, Pearson, Edexcel
- Nervous system, pages 69-71, GCSE Biology, CGP, Edexcel
- Nervous systems, page 23, GCSE Combined Science; The Revision Guide, CGP, Edexcel