Difference between revisions of "Neuron"
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| − | A [[specialised cell]] in [[Animal|animals]] which [[Transmit|transmits]] electrical [[Impulse (Biology)|impulses]] around the body. | + | ==Key Stage 3== |
| + | ===Meaning=== | ||
| + | A '''nerve cell''' is a [[Specialised Cell|specialised cell]] in [[Animal|animals]] which [[Transmit|transmits]] electrical [[Impulse (Biology)|impulses]] around the body. | ||
| + | |||
| + | ===Adaptations of Nerve Cells=== | ||
| + | : '''Nerve Cells''' have an elongated shape to send electrical [[Impulse (Biology)|impulses]] more quickly. | ||
| + | : '''Nerve Cells''' have branches called [[dendrite]]s to link up to other '''nerve cells'''. | ||
| + | |||
| + | ===About Nerve Cells=== | ||
| + | : All [[nerve]]s in the body are made of '''nerve cells'''. | ||
| + | : '''Nerve cells''' are specially [[Adaptation|adapted]] to send electrical signals quickly. | ||
| + | : Many '''nerve cells''' grouped together make [[Nerve Tissue|nerve tissue]]. | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:NerveCell.png|center|400px]] | ||
| + | |} | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | [[Neuron]]s are [[Specialised Cell|specialised cells]] in the [[Nervous System|nervous system]] which [[Transmit|transmits]] electrical [[Impulse (Biology)|impulses]] around the body. | ||
| + | |||
| + | ===Adaptations of Neurons=== | ||
| + | : '''Neurons''' have an elongated [[axon]] to send electrical [[Impulse (Biology)|impulses]] more quickly. | ||
| + | : '''Neurons''' have branches called [[dendrite]]s to link up to other '''neurons'''. | ||
| + | : The [[axon]] of a [[neuron]] is covered in a [[Myelin Sheath|myelin sheath]] which acts as an [[Electrical Insulator|electrical insulator]] to maintain the strength of the [[Impulse (Biology)|impulse]] as it passes along the [[axon]]. | ||
| + | |||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |[[File:NeuronDiagram.png|center|400px]] | ||
| + | |- | ||
| + | | style="height:20px; width:200px; text-align:center;" |A [[diagram]] of a [[Motor Neuron|motor '''neuron''']]. | ||
| + | |} | ||
| + | |||
| + | ===About Neurons=== | ||
| + | : '''Neurons''' join together to form [[nerve]]s. | ||
| + | : The point where two '''neurons''' meet is called a [[synapse]]. | ||
| + | : At the [[synapse]] between two '''neurons''' the [[Impulse (Biology)|electrical impulse]] must be [[transmit]]ed across the gap. | ||
| + | There are three different types of '''neuron''' you should know: | ||
| + | *[[Sensory Neuron]] | ||
| + | *[[Relay Neuron]] | ||
| + | *[[Motor Neuron]] | ||
| + | |||
| + | ===References=== | ||
| + | ====AQA==== | ||
| + | |||
| + | :[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Nerve cells, page 14, GCSE Biology; The Revision Guide, CGP, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945598/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945598&linkCode=as2&tag=nrjc-21&linkId=ad276ad49df77ab4b40ab4fd0fe10095 ''Nerve cells, page 14, GCSE Combined Science; The Revision Guide, CGP, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945954/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945954&linkCode=as2&tag=nrjc-21&linkId=100574c08fbbb64318256eb79ed61a76 ''Nerve cells, page 31, GCSE Biology, CGP, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782946381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946381&linkCode=as2&tag=nrjc-21&linkId=5ec5fc3f6429e30c1d9ab9bca2bccf93 ''Nerve cells, page 31, GCSE Combined Science Trilogy; Biology, CGP, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1471851354/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851354&linkCode=as2&tag=nrjc-21&linkId=9012a0d354024419214fb3ad5ac44ba0 ''Nerve cells, page 9, GCSE Combined Science Trilogy 1, Hodder, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1471851338/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851338&linkCode=as2&tag=nrjc-21&linkId=425855d5890466e47189e1c21b67a1ea ''Nerve cells, pages 8, 9, GCSE Biology, Hodder, AQA ''] | ||
Latest revision as of 17:09, 9 November 2019
Contents
Key Stage 3
Meaning
A nerve cell is a specialised cell in animals which transmits electrical impulses around the body.
Adaptations of Nerve Cells
- Nerve Cells have an elongated shape to send electrical impulses more quickly.
- Nerve Cells have branches called dendrites to link up to other nerve cells.
About Nerve Cells
- All nerves in the body are made of nerve cells.
- Nerve cells are specially adapted to send electrical signals quickly.
- Many nerve cells grouped together make nerve tissue.
 |
Key Stage 4
Meaning
Neurons are specialised cells in the nervous system which transmits electrical impulses around the body.
Adaptations of Neurons
- Neurons have an elongated axon to send electrical impulses more quickly.
- Neurons have branches called dendrites to link up to other neurons.
- The axon of a neuron is covered in a myelin sheath which acts as an electrical insulator to maintain the strength of the impulse as it passes along the axon.
 |
| A diagram of a motor neuron. |
About Neurons
- Neurons join together to form nerves.
- The point where two neurons meet is called a synapse.
- At the synapse between two neurons the electrical impulse must be transmited across the gap.
There are three different types of neuron you should know:
References
AQA
- Nerve cells, page 14, GCSE Biology; The Revision Guide, CGP, AQA
- Nerve cells, page 14, GCSE Combined Science; The Revision Guide, CGP, AQA
- Nerve cells, page 31, GCSE Biology, CGP, AQA
- Nerve cells, page 31, GCSE Combined Science Trilogy; Biology, CGP, AQA
- Nerve cells, page 9, GCSE Combined Science Trilogy 1, Hodder, AQA
- Nerve cells, pages 8, 9, GCSE Biology, Hodder, AQA