00:01
Okay, this question here says oxygen dissociation curve shifts to the right by all of the following except so you have here your curve that is something like this okay, so this is your normal oxygen -hemoglobin dissociation curve okay, and this curve can shift to the left or to the right so what things are going to make your curve to shift to the right? so those practically those events that are going to cause a decrease affinity for oxygen.
00:45
Okay, and when does it happen? it happens when you have high levels of carbon dioxide with a resulting increase in hydrogen ions concentrations and a resulting low ph okay, so practically any of this can cause a decrease affinity for oxygen and hence a right shift of the curve also, you can have here increased levels of this molecule here 2 ,3 -dqg and also increased temperature.
01:20
And what happens in the left? practically the opposite of all of this.
01:24
It means you have when you shift your curve to the left it occurs because of an increased affinity for oxygen and it happens when you have low levels of carbon dioxide low levels of hydrogen ions and hence an increased ph okay, also it happens when you have decreased 2 ,3 -dpg and also decreased temperature so practically all of the opposite of all of the things that you have here.
01:53
So in that case, they are asking you shift to the right in this case well, except it says it means you have to look for the things that shift your curve to the left and this is gonna be you have increased hydrogen ions.
02:08
This is gonna be for the right so this is correct it says carbon dioxide.
02:13
Well, they are not specifying like increase or decrease in carbon dioxide.
02:16
It says increased temperature this is for the right...