I’m struggling in biology online school and I’m now catching up with everything. I’m so glad to have found your videos, they make so much sense and I’m understanding
Omg you are an angel! you should deserve a medal for the best explainer in the world. you saved me alot especially in this lesson as my teacher explained it in a inunderstandable way Thank you so much for your effort❤️❤️❤️
I’m sat ill rn with a bad ear infection. Struggling to revise. I’m watching ur videos as they make me feel like I’m doing something and not staying sick in bed !! Thanks for the amazing videos
You literally saved me. My alevel exams are in a few days and you’re the ONLY one that taught this topic so well. Really I’m so thankful! ❤️❤️ means a lot
Thank you so much for explaining everything really well. One of my biology teachers doesn't explain stuff very well so it doesn't make sense but this has helped me so much! Same with your other videos as well.
this was so helpful!!! better than the diagrams and notes given by my bio teacher lol!!!!!!!!!!!!!! thank u, u are definitely helping other children and me myself struggling in this topic I've found hard.
Hi miss, in the OCD curve why does the saturation of oxygen start increasing at low partial pressure of oxygen? Because if lower po2 is at the tissues then why does the haemoglobin need to aquire the oxygen in the first place because isn't loading supposed to happen at the lungs and not tissues anyways? Thanks a lot!
what this means is that haemoglobin isn't unloading all of the oxygen at those tissues, only some. This is useful as it prevents wasting oxygen, as if those tissues have a higher ppO2 it means there is already some oxygen at that sight. Hope that helps 😊
Hey, partial pressure is a way to consider the concentration of gases, but it literally means the pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own.
How does carbon monoxide cause less oxygen to be delivered to our muscles? Is it because CO binds to haemoglobin more strongly than O2 therefore it takes up the space instead of O2 so less O2 can bind? Or is it because CO causes O2 to bind more strongly to the haemoglobin therefore O2 can bind but its just that it can't be unloaded?
In the section where you mention the dove, the curve shifts to the right meaning it is easier to unload oxygen to respiring tissues but if the affinity of oxygen is decreased how will it meet the dove's metabolic requirement ?
The curve shifts to the right as there is low affinity. This means more oxygen is unloaded readily. This is favourable because it allows more oxygen to be unloaded at the tissues of the dove, so that the dove can respire further to transfer energy in the form of ATP. Metabolism is the rate of chemical reactions occurring in the body, so if the dove has a high metabolic rate, it means it produces more waste (CO2) and uses more o2. Therefore, the dove's haemoglobin has adapted using low affinity of o2.
@@jasonsingh9698 it makes more sense now, i did forget about how the co2 concentration can also effect haemoglobin which then releases the o2 in favour!
Hello do we need to know factors affecting the affinity of haemoglobin of oxygen - partial pressure of O2, saturation of heamoglobin and partial pressure of CO2
If there is little carbon dioxide present then this indicates that there is little respiration occurring, and therefore no advantage of unloading oxygen. Therefore, it is more advantageous to have a higher affinity so that the Hb can become saturated with oxygen to deliver oxygen to respiring cells where it is needed. Hope that helps.
Not every school does AS levels, so not always. Every uni focuses on particular aspects. Some heavily base decisions on gcses, others on personal statement others on predicted grade. Have a look at each universities admissions page to find out more. Hope that helps
If HbF has higher affinity for oxygen at low partial pressures, doesn't that mean it unloads oxygen less readily at respiring cells? How is that helpful
@@Alex-up8pg okay but it dissociates less readily too, so less can be taken up in respiration so what's the point since we only need oxygen for respiration?
omg, thank you so much, i wish you were my teacher :( i love the way you just get to the point and explain so well. thank you for helping meee, I hope I will get good grades. thank you
A good way to remember it : Right = RELEASE more oxygen and Left = LOAD more oxygen
This is so helpful thank you !
This is actually so helpful, thanks 😚
life saver. thank you
Thank you!
You're saving my A Level grade!
aww thanks Sam! Glad the videos are helping
I’m struggling in biology online school and I’m now catching up with everything. I’m so glad to have found your videos, they make so much sense and I’m understanding
It must be so hard with online learning. I'm really glad that my videos are able able support with your studies. Good luck 😊
Omg you are an angel! you should deserve a medal for the best explainer in the world. you saved me alot especially in this lesson as my teacher explained it in a inunderstandable way
Thank you so much for your effort❤️❤️❤️
awww thank you 😊 So pleased you found the explanation helpful
I’m sat ill rn with a bad ear infection. Struggling to revise. I’m watching ur videos as they make me feel like I’m doing something and not staying sick in bed !! Thanks for the amazing videos
Hope you're feeling better!
You literally saved me. My alevel exams are in a few days and you’re the ONLY one that taught this topic so well. Really I’m so thankful! ❤️❤️ means a lot
Thank you so much for your lovely comment! So pleased that it helped you so much ☺
I was about to lose it but you've made understanding this 1,0000000000x easier.
I cant thank you enough!!!!!!!
Hello 👋🏻
So happy it helped clear up this topic for you 😁
Hopefully you find the other videos helpful too.
Thank you so much for explaining everything really well. One of my biology teachers doesn't explain stuff very well so it doesn't make sense but this has helped me so much! Same with your other videos as well.
Your videos are so good! So precise and clear, you deserve way more views and subs. Thank you!
Thank you Megan 😀 Hope they continue to help you!
thank you so much for this, after so long of not understanding this topic, i finally did thanks to miss estruch!! thankyou
Hi Ria,
So pleased you are feeling confident with this topic now 😀
:)
Thank you for the best explanation!
yay, you're welcome 😊
this was so helpful!!! better than the diagrams and notes given by my bio teacher lol!!!!!!!!!!!!!! thank u, u are definitely helping other children and me myself struggling in this topic I've found hard.
You're very welcome! So happy you found it helpful 😁😁
your videos are actually saving me, thank you so much! xx
I'm really pleased they are helping you Lauren 😀 !
@@MissEstruchBiology They really are helping especially with this pandemic and no school, keep it up - seriously grateful! :) xx
Let me know any requests you may have
@@MissEstruchBiology Will do, thank you so much!
you saved me
was searching a lot to underst those cncepts ❤️❤️
Hello!
So glad you found it helpful after looking for something to help 😁😁 Hopefully you'll find the other videos helpful too.
Thank you for these videos!
You're welcome 😊 Hope the videos are helping you.
you’re the best
Thank you 😊
so useful. AS exam is tomorrow. thanks so much
You're welcome!!! Hope it went well
@@MissEstruchBiology it did :) no small thanks to you
class video,
explains it really well
thank you. So pleased it helped 😀
You have literally saved me !!! Thank you so much
awww you're so welcome 😁
Thanks for this video, it was a good break down allowing me to put things down correctly
Thank you! Glad you liked it and found it an easy study video to follow 😀
Thank you, this helped a lot!
Glad it helped 😊
Thank you so much for these amazing videos which literally make me understand these topics easily.
Really pleased they help you to understand 😀
Hi miss, in the OCD curve why does the saturation of oxygen start increasing at low partial pressure of oxygen? Because if lower po2 is at the tissues then why does the haemoglobin need to aquire the oxygen in the first place because isn't loading supposed to happen at the lungs and not tissues anyways? Thanks a lot!
what this means is that haemoglobin isn't unloading all of the oxygen at those tissues, only some. This is useful as it prevents wasting oxygen, as if those tissues have a higher ppO2 it means there is already some oxygen at that sight.
Hope that helps 😊
Thank you, genuinely thank you so much
You're welcome 😊 So pleased you're finding it helpful
hi miss, do you mind explaining what is actually meant by partial pressure, thanks :)
Hey, partial pressure is a way to consider the concentration of gases, but it literally means the pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own.
@@MissEstruchBiology thank you :>
Your videos are so good:))
Thank you! I hope they help with your studies! 😊
Thanksss
You're Welcome 😁😁
thank you so much miss!!
you're welcome 😊☺
Excellent !
Thank you! So glad you like it 😊
How does carbon monoxide cause less oxygen to be delivered to our muscles? Is it because CO binds to haemoglobin more strongly than O2 therefore it takes up the space instead of O2 so less O2 can bind? Or is it because CO causes O2 to bind more strongly to the haemoglobin therefore O2 can bind but its just that it can't be unloaded?
Hello , the first one. It binds to Hb and in doing so blocks oxygen from binding.
cool and understandable
Thank you!
Thank you!!!! x
You're welcome!!!!
In the section where you mention the dove, the curve shifts to the right meaning it is easier to unload oxygen to respiring tissues but if the affinity of oxygen is decreased how will it meet the dove's metabolic requirement ?
The curve shifts to the right as there is low affinity. This means more oxygen is unloaded readily. This is favourable because it allows more oxygen to be unloaded at the tissues of the dove, so that the dove can respire further to transfer energy in the form of ATP. Metabolism is the rate of chemical reactions occurring in the body, so if the dove has a high metabolic rate, it means it produces more waste (CO2) and uses more o2. Therefore, the dove's haemoglobin has adapted using low affinity of o2.
@@jasonsingh9698 it makes more sense now, i did forget about how the co2 concentration can also effect haemoglobin which then releases the o2 in favour!
Hello do we need to know factors affecting the affinity of haemoglobin of oxygen - partial pressure of O2, saturation of heamoglobin and partial pressure of CO2
hey yes you do need to know that
8:57 what is the advantage? if there is little to no CO2 present as it means there is more saturation of oxygen?
If there is little carbon dioxide present then this indicates that there is little respiration occurring, and therefore no advantage of unloading oxygen. Therefore, it is more advantageous to have a higher affinity so that the Hb can become saturated with oxygen to deliver oxygen to respiring cells where it is needed.
Hope that helps.
Hello,
How do we know if the curve has has shifted left or right
there will be a typical curve plotted on the graph also for you to compare against. 😊
Do universities look at as-level grades or a level grades when you apply
Not every school does AS levels, so not always. Every uni focuses on particular aspects. Some heavily base decisions on gcses, others on personal statement others on predicted grade. Have a look at each universities admissions page to find out more.
Hope that helps
If HbF has higher affinity for oxygen at low partial pressures, doesn't that mean it unloads oxygen less readily at respiring cells? How is that helpful
Its meant to be helpful cause oxygen can associate more easily to the haemoglobin, so it's helpful in low oxygen environments eg high altitudes
@@Alex-up8pg okay but it dissociates less readily too, so less can be taken up in respiration so what's the point since we only need oxygen for respiration?
omg, thank you so much, i wish you were my teacher :( i love the way you just get to the point and explain so well. thank you for helping meee, I hope I will get good grades. thank you
Aww thank you! Hopefully all your hard work pays off and you smash it and get the grades you deserve 🤞🤞
great video but i think she got left and rights confused with the OHD curve graphs
Hello,
At which minute in the video and I'll check.
ily
At 7:21 says curve shift to left, increased affinitt so uploads more oxygen. Do you mean loads more 02 or in the sense that unloading easier
Loads more
Is this for A Level ocr biology new spec?
Hello,
It is tailored for AQA new spec, but that is very similar to OCR.
I've got an end of topic test tomorrow and your videos have really helped, thank you!
Good luck for your test!! Really glad you've found the videos helpful 😀
I got an A on it, deffo wouldn't have got that without your videos!
@@jacoblenton8796 well done!
@@estherkerr4773 thanks 😁