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A selectively permeable membrane separates solution a and b. the concentration of water molecules in solution b is higher than that in solution a. describe how the water molecules will move?
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What structure acts as a selective barrierregulating the traffic of materials into and out of the cell?
Cytoplasm is the selectively permeable structure that separates intracellular material from extracellular material.
What techniques separates molecules based on size?
Filtration separates particles based on size.
In the plant cell how are the functions of the cell wall and cell membrane different?
A cell membrane is semi-permeable or selectively permeable. Cell walls are fully permeable. The cell wall provides strength and support to a cell and prevents over expansion of a cells content if there is movement of water into cells. Cell walls are made from murien in prokaryotes and either cellulose or chitin in eukaryotes. The cell membrane allows the entry or exit of substances into or out of the cell. It also separates a cells internal environment from its external environment. A cell membrane is made of phospholipids and proteins.
What are two functions of a cell membrane and what do the do?
The cell membrane is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively-permeable to ions and organic molecules and controls the movement of substances in and out of cells. It consists of the phospholipid bilayer with embedded proteins. Cell membranes are involved in a variety of cellular processes such as cell adhesion, ion conductivity and cell signaling and serve as the attachment surface for the extracellular glycogalyx and cell wall and intracellular cytoskeleton.\In easy way:The cell membrane has tiny holes that control the movement of chemicals in or out of cell.Dissolved substances such as food,oxygen and carbon dioxide can pass through cell membrane.Some harmful chemicals are stopped from entering cell membrane.
When a solid dissolves in a liquid it seems to disappear into it. how is it possible?
The solid separates down to the molecular level - and they mix with the water molecules. We cannot see molecules with the naked eye !
What structure acts as a selective barrierregulating the traffic of materials into and out of the cell?
Cytoplasm is the selectively permeable structure that separates intracellular material from extracellular material.
Which organelle has a semi permeable membrane and separates the cell from it's environment?
The cell membrane (or plasma membrane) shows semi-permeability. In short some substances, such as gases and small electrically-neutral molecules CAN pass, while others like glucose and other large polar molecules CANNOT pass. Although glucose and other large polar molecules cannot pass through the semi-permeable cell membrane, they may enter through the interior of transport proteins.
What techniques separates molecules based on size?
Filtration separates particles based on size.
Why is osmosis special type of diffusion?
Osmosis is considered a specialised type of diffusion because it ONLY involves water passing from a region of high water potential to an area of low water potential through a partially-permeable membrane. Osmosis takes place primarily in our small intestines, where water is absorbed.
In the plant cell how are the functions of the cell wall and cell membrane different?
A cell membrane is semi-permeable or selectively permeable. Cell walls are fully permeable. The cell wall provides strength and support to a cell and prevents over expansion of a cells content if there is movement of water into cells. Cell walls are made from murien in prokaryotes and either cellulose or chitin in eukaryotes. The cell membrane allows the entry or exit of substances into or out of the cell. It also separates a cells internal environment from its external environment. A cell membrane is made of phospholipids and proteins.
When a covalent compound dissolveds it separates into?
Generally its individula molecules.
Cells are bounded by which structure which separates the inside of the cell from the outer environment and which acts as a selectivesemi-permeable filter for the cell?
"membrane"
Fuctions of a plasma membrane?
1. It separates cell contents from the external environment. 2. Semi-permeable membrane allowing the passage of substances.
What separates molecules by movement due to size and electrical charge?
gel electrophoresis
How do molecules dissolve a salt?
The water molecules move around the salt ions In water, the salt separates into positive and negative ions.
What happen to the portion of the cell membrane that surrounds a large molecules during endocytosis?
it separates from the membrane.
How do water molecules dissolves a salt?
The water molecules move around the salt ions In water, the salt separates into positive and negative ions.
