Question

Dialysis tubing comes in different ratings for permeability, depending on how big the holes are in the tubing. You are a dialysis technician and you must choose the right tubing for your patient. You choose the one with the pores that are just large enough to allow glucose to pass through but not larger molecules. Once the blood has passed through the machine and is back in the patient, identify which of the following substances will have been filtered from the patient’s blood? (Hint: can be more than one answer)

a. glucose

b. large albumins

c. plasma proteins

d. small ions

e. peptide hormones

You have a dialysis tubing bag into which you put a 50% saline solution. The pores are small enough to exclude salt from passing through. You have tied the ends up nicely so that the bag is completely sealed. You weigh it and find that it tips the scales at 5.04 grams. Now you put this into a beaker with 20% saline solution and you let this bag sit in the solution for an hour. If you pull the bag out and weigh it now, what do you expect to find? Will it weigh more or less than 5.04 grams, or will it weigh the same? Why?

You put a solution with concentrated methylene blue into a similar dialysis bag as you used for the experiment in the previous question. Methylene blue acts as a dye and is small enough to get through the pores in your dialysis tubing. You put the bag into a beaker of water and leave it for an hour. What happens to the water in the beaker at the end of the experiment? What do we call this process?

1. Dialysis tubing comes in different ratings for permeability, depending on how big the holes are in the tubing. You are a dialysis technician and you must choose the right tubing for your patient. You choose the one with the pores that are just large enough to allow glucose to pass through but not larger molecules. Once the blood has passed through the machine and is back in the patient, identify which of the following substances will have been filtered from the patient’s blood? (Hint: can be more than one answer)

a. glucose

b. large albumins

c. plasma proteins

d. small ions

e. peptide hormones

2. You have a dialysis tubing bag into which you put a 50% saline solution. The pores are small enough to exclude salt from passing through. You have tied the ends up nicely so that the bag is completely sealed. You weigh it and find that it tips the scales at 5.04 grams. Now you put this into a beaker with 20% saline solution and you let this bag sit in the solution for an hour. If you pull the bag out and weigh it now, what do you expect to find? Will it weigh more or less than 5.04 grams, or will it weigh the same? Why?

3. You put a solution with concentrated methylene blue into a similar dialysis bag as you used for the experiment in the previous question. Methylene blue acts as a dye and is small enough to get through the pores in your dialysis tubing. You put the bag into a beaker of water and leave it for an hour. What happens to the water in the beaker at the end of the experiment? What do we call this process?

Answer 1

1. a. Glucose

d. Small ions

The technique of blood filtration in the kidney, in which activity fluid, ions, glucose, and waste products are eliminated from the glomerular capillaries.

2. Weight should be more because The dialysis tubing is a semipermeable membrane. Water molecules can skip through the membrane. The salt ions can no longer omit via the membrane. The internet glide of solvent molecules through  a semipermeable membrane from a pure solvent to a more concentrated solution is referred to as osmosis.

3. Methylene blue migrated slower because it's molecules are larger and heavier.

Diffusion is a passive process- does no longer require energy; therefore, particles can only pass down their awareness gradients (from a location of excessive attention to a place of low concentration); diffusion cannot take place against the concentration gradient of the diffusing particle.