What is a selectively permeable means?
A selectively permeable means is any material that has the ability to allow water to pass through it while retaining salts, minerals and other particles. Most commonly used materials used for construction are concrete, stone, bricks, clay, sand, gravel and others.
What is a selectively permeable membrane?
A selectively permeable membrane is a material that allows some substances to pass through it but not others. It allows some gasses to pass through, while keeping others out. It allows some water to pass through, while keeping other liquids -- such as oil -- out.
What is a selectively permeable ion channel?
A selective permeability ion channel is a type of protein that allows the movement of a specific type of ion through the cell membrane, making it possible for each cell to have a different set of permeability characteristics. Sodium is an example of a permeable ion that is essential for the normal function of most cells in the body due to its role in transporting potassium. Other ions, such as chloride, are involved in generating action potentials in neurons.
What is a selectively permeable protein?
A protein is a biological molecule made of amino acids that carries out a specific function in the body. Some proteins are permeable to certain compounds, allowing the transport of specific substances into and out of the cells. This property of proteins is called selectivity. A protein can also be permeable to a specific type of particle, and this property is known as porosity.
What is a selectively permeable membrane protein?
A membrane protein is a protein that affects the flow of chemicals and other substances through the cell membrane. Some membrane proteins are permeable to specific ions or small molecules. For example, potassium channels are selectively permeable to potassium ions; glutamate-gated chloride channels are permeable to chloride ions, and water channels are permeable to water.
