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A membrane that allows some things to pass through it but not others. It can be to do with size of the molecule, electronic charge or other characteristics. Think of a sieve or colander as an example of the semi-permeable membrane and a mixture of sand and peas as the chemical mixture at one side of the membrane. The membrane will only allow the sand to pass through based on size. In cases such as this, larger molecules could pass through active transport channels and such that may be present on the membrane but these are energy-dependant whereas diffusion across a semi-permeable membrane is not.
What else can I help you with?
What are two main components of cellular membranes?
Partially permeable , permeable , immpermeable .
If a cell membrane suddenly became permeable to all substances could the cell remain alive Explain your answer?
No, if a cell membrane suddenly became permeable to all substances, it would not be able to maintain its internal environment or control the flow of molecules in and out of the cell. This would disrupt essential processes such as maintaining proper concentrations of ions and nutrients, leading to cell dysfunction and eventually death.
What is osmosis in biology?
It is the preceedure in which an atom reproduces with the cell membrane creating a semi-universe in which time and space has no baring. Withing this new dimension species will then begin to grow until they have reached an evolution so great the find the abbility to leave there univers and attack ours, thus the creation of flies. i hope this has helped.Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.The definition contains three important statements:Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.It does not matter too much which order you put these statements in. Nor does it matter if you write the definition as one sentence or three sentences. All that matters in your exam is that you make all three points when you explain what osmosis is.
What is a model used to explain the components and properties of a plasma membrane?
The fluid mosaic model is commonly used to explain the structure and function of the plasma membrane. It describes the membrane as a fluid lipid bilayer with embedded proteins that can move laterally, giving the membrane its dynamic nature. The model helps illustrate how the plasma membrane controls the passage of substances into and out of the cell.
Explain why a cell membrane could not be like the protection dome?
A cell membrane is a selectively permeable barrier that controls what enters and leaves the cell, whereas a protection dome is a rigid, impermeable structure. A cell membrane needs to be flexible to allow for movement and communication, which a protection dome would not allow. Additionally, a protection dome would prevent the exchange of nutrients and waste that is essential for cell survival.
What are two main components of cellular membranes?
Partially permeable , permeable , immpermeable .
What is cell membrane explain in urdu?
plasma membrane is the outer most boundary of animal cell.it is chemically composed of lipids and proteins.it is selectively permeable allow certain materials to move in and out.fluid mosaic modle explain its structure.
Can you explain how a selectively permeable membrane functions?
A selectively permeable membrane allows certain substances to pass through while blocking others based on their size, charge, or other properties. This selective process helps regulate the movement of molecules in and out of cells or compartments, maintaining balance and allowing essential processes to occur.
A model cell half full of an aqueous solution of glucose with a membrane that is permeable to glucose is placed into a beaker of distilled water Explain what is likely to happen?
do you go to UTAS? that is not an answer how is this going to help people ????
If a cell membrane suddenly became permeable to all substances could the cell remain alive Explain your answer?
No, if a cell membrane suddenly became permeable to all substances, it would not be able to maintain its internal environment or control the flow of molecules in and out of the cell. This would disrupt essential processes such as maintaining proper concentrations of ions and nutrients, leading to cell dysfunction and eventually death.
Why the line-with-gaps model is sufficient to explain the movement of materials in osmosis?
The line-with-gaps model in osmosis represents the movement of water molecules across a semi-permeable membrane from an area of high concentration to low concentration. This model simplifies the process by focusing on the movement of water only, ignoring the movement of solute particles. In osmosis, the direction of water movement is determined by the concentration gradient of water across the membrane.
How does the particle theory explain osmosis?
The particle theory explains osmosis as the movement of water molecules across a selectively permeable membrane from a region of higher water concentration to a region of lower water concentration. This movement occurs due to the random motion of water molecules seeking to achieve equilibrium in water concentration on either side of the membrane.
How do you explain the entrance and exit of materials in a cell?
Materials can enter and exit cells in multiple ways. There is the process of osmosis, where water particles move through the partially permeable membrane in the cell wall to a higher concentration gradient - this does not require energy. There is also diffusion, where particles small enough to fit through the partially permeable membrane move down a concentration gradient - this also does not require energy. And then there is active transport, where the cell wall can actually move particles into the concentration gradient they would not naturally move to, and this does require energy. Hope I helped :)
What model is used to explain the componets and properties of plasma membrane?
The Fluid Mosaic Model is used to explain the components and properties of the plasma membrane. This model describes the plasma membrane as a dynamic structure composed of a lipid bilayer with embedded proteins that can move and interact within the membrane.
Explain How oxygen is obtained by animals and then used by animals and then used during cellular respiration?
Diffusion, which is the process of gas transfer, for example, a muscle cell has used the oxygen given to it by the blood cells, another blood cell will carry more oxygen to the cell, and the Co2 and O2 will pass through a semi-permeable membrane (the cell) and transfer the oxygen to the animal.
What is osmosis in biology?
It is the preceedure in which an atom reproduces with the cell membrane creating a semi-universe in which time and space has no baring. Withing this new dimension species will then begin to grow until they have reached an evolution so great the find the abbility to leave there univers and attack ours, thus the creation of flies. i hope this has helped.Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.The definition contains three important statements:Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration.It does not matter too much which order you put these statements in. Nor does it matter if you write the definition as one sentence or three sentences. All that matters in your exam is that you make all three points when you explain what osmosis is.
How does a cell control movement of substances into and out of it. Explain with an example?
One way is by active transport. The sodium-potassium pump is one example of this. Yo keep the interior of the membrane negative and the exterior positive, plus using this method in neural transmissions. the pump pumps out three sodium ions and brings into the cell two potassium ions using the energy of ATP.
