Question

A student investigated the diffusion of substances through visking tubing, an artificial membrane which has some of the properties of cell membranes. The student made a bag of visking tubing.. After 30 minutes at room temperature., the content of visking bag we're stained blue-black., but the water outside remained a yellow color. Explain these results

Answer 1

Answer:

Visking tubing is a selectively permeable membrane, this means it has pores in it which allow small molecules through but not larger molecules. The apparatus used to model absorption in the small intestine can be set up like this.

Explanation:

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Answer 2

Answer:

Visking tube experiment and results:

• Cells are the smallest unit of living organisms, and cells are differentiated to perform different functions.
• For different functions, substances need to move into or out of the cell, but the cell membrane is not permeable for all the substances.
• The enzyme performs the catalysis function.
• To understand the function of osmosis, we use a visking tube, which is an artificial selectively permeable membrane which recapitulates the functions of cell membrane in the lab.
• Small molecules which helps the cell to perform its functions can pass through the microscopic holes of the membrane.
• But large molecules which helps the cell to perform its functions cannot pass through the membrane of the cell. So it needs a specific transport system to travel across the membrane.
• In visking tube experiment, water moves by osmosis from higher concentration into the lower concentration in visking tube, which increases the volume of water in visking tube which forces the water up the capillary tube.

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