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What will and won't pass through a visking tube?
Cannot pass through visking tubing: sugar starch lactose sucrose Can pass through visking tubing: Iodine Glucose Maltose
What is visking tubing?
Visking tubing is a kind of seamless semi permeable tubing, a cellulose tubing, that is made of regenerated cellophane. It is used as an edible casing for sausages or as a membrane in dialysis.
What is a type of tube that is semi-permeable?
visking tubing
Can salt pass through visking tubing?
yes it can
Why it was important to wash the outside of the visking tubing?
it needs to dry
What part of the human body acts a the visking tubing?
capillaries in the villi
Why could glucose could pass through the visking tubing?
Because it has starch in it.
How does a visking tubing differ from a cellmembrane?
Visking tubing contains millions of tiny holes which only let small molecules, like water, diffuse through. Large molecules, such as starch, cannot cross the membrane. We say it is partially permeable (permeable means a substance is able to pass through). This is similar to a cell membrane. Visking tubing can therefore be used as a model of a cell.
What cell structure the dialysis tubing represents?
Dialysis tubing is often used to emulate the selective permeability of the cell membrane.
Can hydrogen ion pass through the pores of dialysis tubing?
No.Hydrogen ion cannot pass through the pores of dialysis tubing.
What substance in the dialysis tubing or jar did not diffuse across the dialysis bag membrane and why?
molecular weight higher than the pore size of the tubing or dialysis bag material doesnt go.
What is the diameter of a dialysis tubing pore?
A dialysis tubing pore is usually 20nm, but some dialysis tubings are specially made to have smaller or larger pores ranging from .85 nanometers to 30 nanometers.
