Nervous System
Contents
Key Stage 3
A diagram of the nervous system.
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
A diagram of the nervous system.
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