Biology, 03.12.2019 07:31 raizagisselle1694

By the end of this lab, you will see how some materials diffuse through a semipermeable membrane but others do not. the materials that you examine will differ in molecule size. some will be larger and some smaller. formulate an investigative question for this situation

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How does molecular size affect to the permeability of the membrane to that molecules? So you will try to find out how many molecules of each kind pass through the membrane per time unit. If molecules pass faster, it’s highly permeable to that material. Some molecules may not pass at all, so then it’s not permeable to that material. Then you can put the materials in order from the lowest to the highest permeability. You can also try to find a mathematical formula that shows how permeability increases or decreases as size increases (usually it decreases). Exel is usually helpful to find that formula: you can make a plot and see if it is linear, exponential, potential, etc. There are other softwares with a larger variety of graph options tan Excel.

Answer from: joannamarquez0701

Permeability is defined as the ability of the membrane or material to allow the passage of ions, molecules, and other substances.

The permeability is affected by the molecule size, molar mass, and polarity of the substance.

The investigative question is:

How does the size of the molecule affect the permeability of the membrane?

Permeability is the property of a membrane, which allows the molecules to diffuse through them. The permeability of the membrane is dependent on:

Molecule size affects the permeability, such that smaller molecules diffuse easily than other large particles. Molar mass also affects the permeability, such that the higher the mass, the lower will be the diffusivity of the molecule. The polarity of the molecule also affects the permeability, for example, polar molecules and ions are unable to pass through the lipid membrane.

Therefore, permeability is affected by certain factors like molecule size and polarity.

To know more about permeability, refer to the following link:

link

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