Question

Is every isotonic solution isosmotic? Explain and provide an example. Many membrane proteins contain transmembrane segments (ie segments which penetrate through the membrane). How must these proteins be formed to allow them to act as an ionic channel? What specialisation would you need to allow it to function as a voltage-gated channel? If sodium is a smaller ion than potassium, then how can a channel be specific for potassium (ie. does not also allow sodium through)?

Answer 1

Ion channels are proteins which are involved in formation of pore, These proteins ploys the very important function in establishing a resting membrane potential Thus proteins changes the Action potentials by managing the flow of ions across the cell membrane These ion channel are locked within the membrane. These are water - filled tunnels that allows only ions of certain size and charge to pass through. These are further divided as per following features voltage gated Ligand gated \r\n Isotonic solution: These solution have some salt concentration as blood and cells of human body. They have non-penetrating solutions They neither absorb or neither absorbed by other cells. Isotonic solution: When two solutions have some number of solutions. In others words, we can say - two solutions have some osmolality Yes, Every isotonic solution is isosmotic if they have balanced number of solutes. For example: Two solutions, containing 4 mole problem