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Waste must be let out of the cell, while nutrients must be kept in. At the same time, nutrients must be let in, and toxins must be kept in.
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It is a membrane in cells that only allows certain things in. For example a long time ago large and small cats had an epidemic of acquired immune deficiency syndrome (aids). a… few cats had cells with selectively permeable membranes that for some reason wouldn't let the aids virus in. Those cats survived and now most cats are resistant to aids. IN ADDITION:Imagine 3 sheets of paper. The first sheet had holes about the size of a golf ball. The second had holes the size of a grape. The third had holes the size of a needle in it. You stack the three together with a space between the three so that these particles can move around a little bit. Now, mash up a whole orange and pour this material on the three membranes. The orange peel can go only as far as the holes will allow it and will stop at the first and may make it to the 2nd sheet. The seeds and pulp will go through the first and second layer but will get stopped by the third. The juice will pass through all three. Another good example is your skin, It allows carbon dioxide and sweat to exit the body but keeps the blood in. It selects what can and cannot pass through its membrane. Some membranes work in one direction only, others allow passage either way. exaclty yay we did it lol plasma membrane
selectivley permeable membranes only allow certain materials to pass through. It allows some molecules to enter the cell and blocks entry to others.
The plasma membrane is selectively permeable because it needs to allow certain things in and certain things out. The plasma membrane is a selectively permeable membrane as i…t allows the entry and exit of some selected substances only.
Because it can pass some liquids, minerals and water through it.
It permits to enter different important ingredients and different types of salts to cytoplasm which is important to cell growth, function and metabolism but don't allow to tra…nsmit any unnecessary and harmful constituents such as unnecessary amino acid, not to use in protein synthesis then, different types of harmful drug which we take as medicine. So we can see it allow only selected item. That's why it is called as Selectively Permeable Membrane.
It is selective about what can come in and out of the cell. An example of a Selectively Permeable membrane is a cell membrane.
Regulates what enters and leaves the cell
What does selective permeability mean what is responsible for the selective permeability of the plasma or cell membrane?
Permeability- being able to be pierced/passed through.
Let trans-membrane transport of molecules be either passive, or facilitated, or active: the plasma [bi-lipid layer] membrane has the power to exclude molecules It selects from… passage through the Membrane into the Cell's interior.
it regulates what materials enter and leave the cell
Yes, it is selective about the compounds and molecules it allows across the membrane.
Yes... I'm pretty sure it is
it only allows specific things to enter.
When a cell's membrane is permeable, it means that only certain proteins and other molecules can go in and out of the porous membrane, through protein pumps and other pathways…. Some molecules stay inside the cell, while others float outside. Starches, for example, are large molecules that cannot pass through the membrane.
It allows some molecules to enter the cell and blocks entry to others
The Plasma Membrane of a Cell is used to separate the outside ofthe cell to the inside. The membrane is selectively permeable sothat important nutrients and other substances c…an enter the cellbut things like toxins can not