Unit 6 oinon 5. Is this process reversible? Remove the cover slip and gently rin
ID: 209717 • Letter: U
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Unit 6 oinon 5. Is this process reversible? Remove the cover slip and gently rinse the red onion skin under tap water while holding onto it with your fingers. Rinse the cover slip as well. Add a few drops DI Nes pok under the microscope. List your observations here jwaote v n oony inidu Osmosis is defined as the diffusion of free water across a selectively permeable membrane. In the red onion observations: Give the name of the "selectively permeable membrane" that surrounds a cell. a. Which direction did the free water diffuse when salt water was added outside of the red onion cells? b. c. Based on your observations, free water moves through the aquaporins towards the side of the membrane where the solute concentration (dissolved particles in the water) isExplanation / Answer
Answer A: Plasma membrane is the "selectively permeable membrane that surrounds a cell. A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport.
Answer B. If the salt water is added to the outside of the red onion cells then the free water will diffuse outside the red onion cells from inside of the cell to maintain an equilibrium of the solute concentration. Thus the size of the cell will shrink as the water moves outside of the cell.
Answer C. According to our observation free water moves through the aquaporins to the side of the red onion cells where the solute concentration is more, so that an equilibrium of the solute concentration between outside and inside of the cell can be maintained.
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