In: Biology
ANSWER
1)
One such substance would toxins such as Lithium,
which should have been removed by a well-functioning kidney, but
requires dialysis on the absence of one.
ANSWER
2)
We can make up the make up the composition of dialysis
fluid to exactly resemble every other component of blood except
this toxin, the concentration of this toxin in the dialysis fluid
should be zero. This will ensure that this potentially
toxic substance is got rid of.
ANSWER
3)
One such substance that would be dissolved in blood and should not
be lost in dialysis is dissolved oxygen because it is
essential for many activities.
ANSWER
4)
We can make up the make up the composition of dialysis
fluid to have the exact same concentration of the dissolved
substance that we want to keep as is its concentration in
blood. This will ensure that this dissolved substance of
need will not be able to diffuse through from the blood to the
dialysis fluid.
ANSWER
5)
The principle (concept or idea) which results in blood
no losing this substance is called isotonicity. Since the
concentration of this item is the same on both sides, there exists
no concentration gradient (driven by Brownian motion) to cause any
transfer of material from the side with higher concentration to the
side with lower concentration.
Thus making the dialysis fluid have the same concentration of the
substance as blood, causes there to be no concentration gradient
which is the driving force for diffusion.