What is a selectively permeable membrane and how does it function?

Answer 1

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

Answerplasma membrane

Answer 2

The function of a selectively permeable membrane is to control the movement of nutrients and wastes into and out of the cell. It helps maintain homeostasis by keeping the internal environment of the cell relatively constant.

Answer 3

It is selective about what can come in and out of the cell. An example of a Selectively Permeable membrane is a cell membrane.

Answer 4

Regulates what enters and leaves the cell