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No; the sucrose molecule (as a disaccharide) is too large to pass through by passive diffusion. Glucose, on the other hand, (a monosaccharide) is able to permeate the dialysis tubing. In the body, glucose/sucrose is transmitted across membranes though the use of active/facilitated diffusion.
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How is dialysis membrane selectively permeable?
a dialysis membrane is selectively permeable, it is used in experiments to simulate cellular membranes, and it is permeable to water but not to sucrose.
What is required for osmosis and dialysis?
a semi permeable membrane
What does a dialysis bag represent?
A semi permeable plasmodial membrane
A cell membrane is like a what?
A semi-permeable membrane. It could be compared to dialysis tubing.
Is dialysis osmosis or diffusion?
Dialysis is the separation of particles in a liquid on the basis of differences in their ability to pass through a membrane. As a semi permeable membrane is involved, so it is an osmosis.
Are the membranes in a dialysis machine permeable or selectively permeable?
The dialysis membrane is selectively permeable because it doesn't allow all cells to go through it. Think of it as a kidney. When blood is sent to the kidney, the blood cells cannot fit through the dialysis inside the kidney, but the waste and bacteria in the cells do. So, The dialysis membrane is selectively permeable.
Is the Visking tubing a partailly permeable membrane and why?
Yes, it is a partially permeable membrane. It allows certain substances like glucose and water molecules to diffuse through but not large molecules like starch and sucrose. Selectively permeable.
Why did osmosis, but not diffusion of sucrose molecules, occur across the dialysis membrane containing 20% sucrose solution?
Sucrose cannot diffuse across a dialysis tubing. This is because it's size is too large to go through the tubing. Water can diffuse across.
What substances in the blood pass through the partially permeable membrane into the kidneys?
As the dialysis fluid has no urea in it, there is a large concentration gradient - meaning that urea moves across the partially permeable membrane, from the blood to the dialysis fluid, by diffusion. This is very important as it is essential that urea is removed from the patients' blood.
What is dialysis tubing supposed to mimic?
The dialysis tubing is meant to represent the semi permeable membrane of a cell. Like the cell membrane, dialysis tubing has holes or pores that only allow certain things to pass through. A cell membrane similarly will only allow certain things to pass in and out.
What scientific idea is a dialysis machine based on?
is based on diffusion of waste substances through a selective permeable membrane
Which part of a kidney dialysis apparatus actually takes the place of the nephron?
tubing made of selectively permeable membrane
