(a) A drop of ink is placed gently at the base of a beaker containing water by a means of dropper. What will happen? (b) Put a drop of blood in water containing 5M glucose and 0.9% Nacl. What will happen to the drop of blood
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(a) Inkwell gets diffused in water because of the random motion of water and ink molecules will take place in the beaker.
On a large scale, we don’t see the individual molecules moving. Instead, we see how dark the ink is at different points in the solution, which actually indicates its concentration.
We can see the ink move slowly from areas of higher concentration to those of lower concentration, and the rate of this movement is proportional to the diffusion coefficient of the ink in water.
(b) Due to osmotic pressure, urging the glucose to go across the RBC, membrane to come to equilibrium.
Due to the osmotic pressure of water, water wants to come “out” of the cell in order to bring the concentration of glucose down into the outside environment.
Since it cannot, water continually rushes out of the cell until the cell water is depleted.
So glucose will not be able to cross RBC membrane and mix with blood.
Red Blood Cell, RBC, salt case: there is a higher concentration of salt outside the Red Blood Cell, RBC, and a higher concentration of water inside the cell.
The salt from outside rushes through the membrane to bring the cell to equilibrium while the water rushes outside to bring the outside to equilibrium.
When the water rushes out, the cell "deflates" and becomes crinkled, a process called crenation
On a large scale, we don’t see the individual molecules moving. Instead, we see how dark the ink is at different points in the solution, which actually indicates its concentration.
We can see the ink move slowly from areas of higher concentration to those of lower concentration, and the rate of this movement is proportional to the diffusion coefficient of the ink in water.
(b) Due to osmotic pressure, urging the glucose to go across the RBC, membrane to come to equilibrium.
Due to the osmotic pressure of water, water wants to come “out” of the cell in order to bring the concentration of glucose down into the outside environment.
Since it cannot, water continually rushes out of the cell until the cell water is depleted.
So glucose will not be able to cross RBC membrane and mix with blood.
Red Blood Cell, RBC, salt case: there is a higher concentration of salt outside the Red Blood Cell, RBC, and a higher concentration of water inside the cell.
The salt from outside rushes through the membrane to bring the cell to equilibrium while the water rushes outside to bring the outside to equilibrium.
When the water rushes out, the cell "deflates" and becomes crinkled, a process called crenation
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