Rods and Cone cells: Photoreceptors in the human retina. A-level Biology Nervous System
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- Опубліковано 31 тра 2024
- Learn the structure and function of the rods and cone cells, how a stimulus can generate an action potential and the distribution of these cells in the human retina.
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every school needs a Ms Estruch as their Biology teacher
aww thank you
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You are the A Level version of Shaun from Freesciencelessons!!
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YOU ARE A VERY GOOD TEACHER, I ENJOY WATCHING YOUR VIDEOS. KEEP IT UP
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A brilliant video. As a "Computer Scientist" with 50 years experience of the evolution of engineering involved in visual displays this is the first time I feel I have some kind of "Insight" into how the neural triggers connect to our thought paths and then, all being well, perceive color.
Its a big deal these days when it comes to all the visual media like Film, Virtual Reality and TV screens.
Your video provides an excellent link between Human Anatomy and Information Technology (IT). Thank you. Party on.
Thank you so much for this video! Very concise and easy to understand :)
You're welcome 😊 Really pleased it's helped with your learning.
this video is acc amazing! Thank you so much! saving my mock grades :)) xx
Thank you 😊 Good luck with your mocks!!! So glad it helped you.
Hello, great viedo! one question tho, whats the difference between spatial summation and convergence?
amazing as always-saved my a levels
so glad it helped
thank you so much!!
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hi! thank you so much with this video, i've been self-learning bio over the summer so that i can get ahead on content so that i can focus year 13 on exam questions and your videos really help with stuff i'm confused on when the textbook doesn't explain information well :)
i'm still confused at 4:40 as to why rod cells can only distinguish objects in black and white? is it because of the retinal convergence mentioned in the top paragraph?
thank you for your help :)
It's to do with the pigment it contains, it only detects light or dark, not color.
So glad my videos have been helping you!!!
@@MissEstruchBiology thank you!
Thanks so much for the video, it was helpful :) I just have a question you said here 2:16 that generator potential is same as action potential isn't the generator potential is the same as the graded potential? cause I'm a bit confused now
Hi,
graded potentials aren't on the AQA specification, but they are different to action potentials.
Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none and occur in the dendrites
@@MissEstruchBiology thanks
Do come and rod cells go through mitosis and if so how are new connections to the bipolar cells are made?I find this really fascinating.
Hello,
Im not sure on this I'm afraid, but I do know that most cells that are part of the nervous system cannot replicate so perhaps that is the case for rods and cones and this is why you got blind if you damage the retina?
6:33 miss did an oppsy
Are you suppose to know the different pigments ? btw great video
Depends on your exam board's specification. For AQA you need to know the iodopsin and rhodopsin.
💝
has anybody got any proof that rod and cone cells actually exist and that cone cells respond to red green and blue to enable us to see colour??
yeah. lots of experiments have been conducted on this. Has even come up as application question in the exam before
@@MissEstruchBiology what are these experiments then?? Can you reference them so I can verify that what you say is true?
phew still at it