The Nervous System - GCSE Biology (9-1)
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- เผยแพร่เมื่อ 4 ก.ค. 2024
- This video covers the following syllabus objectives from Edexcel IGCSE Biology 9-1
2.87 Understand that the central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves.
2.88 Understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses.
2.89 Understand the role of neurotransmitters at synapses.
2.90 Describe the structure and functioning of a simple reflex arc illustrated by the withdrawal of a finger from a hot object.
For a PowerPoint on this topic please visit www.mrexham.com
As a trainee science teacher I am finding your videos invaluable .
Thank you
Great explanation! I have got an assesment tomorrow and I have never studied this subject, but I need to know it and in 5 minutes I understand everything from this video! Great job! My teacher would have not managed to explain this so simple and clear in a whole lesson. Thank you!
Thank you, glad it was helpful
I'm 13 and learning this oh well, Doesn't hurt to know more.
I understood this very easily
Thank you so much! :D
Sweat
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Bloody lifesaver! Thanks for the help
No problem
please could you add this to the co-ordination and response playlist? Thanks the vid is great !!!!
Lifesaver for real
thank you :)
This was so helpful. Thanks you so much
No problem
Hey ,thanks so much but I can I get some help ,explaining the resting and action potential please?
Thank you!
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quick question, is there a synapse between the relay and motor neurone as well or is it only there in between the sensory and relay?
Yes there is
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oh just realised i commented already lol sorry!
😂
the eyes sight and tongue is chemicals
but I still don't know what is the synapse
Hey. The synapse is the gap between two neurones. For an electrical signal to cross to another neurone, in order to be carried to the CNS, it has to cross a gap between each neurone. This gap is called the synapse. However, to cross this gap, the impulse has to change into a chemical impulse, rather from electrical. Hope this helps :) If you search the synapse up and look online you can find some helpful images. I will leave you with a link. (Copy and Paste / CTRL+C and CTRL V)
www.bing.com/images/search?view=detailV2&ccid=iPMJflDa&id=412E3E74554E212A7552EB89DC71D4D085C531DA&thid=OIP.iPMJflDa2WJiVogTOkU1kgHaFj&mediaurl=http%3a%2f%2f3.bp.blogspot.com%2f-oulaC4PV0sw%2fV1Y4OskA1yI%2fAAAAAAAAb20%2f_clCVq9Y7DsvpM7CQU6PBJCTwC9D-VEsQCK4B%2fs1600%2fsynapse.jpg&exph=750&expw=1000&q=synapse&simid=608034100437319697&ck=A9BC82C62D732C40A8B313394B663532&selectedIndex=37&ajaxhist=0
As you can see from the image, there are two separate neurones and a gap in-between. That gap is the synapse and the little dots in-between represent the impulse being carried as a chemical. :)
@@mollyhardwicke8993 thank you soo mush
a synapse is a connection between 2 neurons
noice