Question

osmosis across a cell membrane can be modeled using a u - shaped tube. one solution is poured into one end of the tube, and another solution is poured into its other end. both solutions are made by dissolving a solute such as salt in water, but the two solutions do not have the same concentration. at the bottom of the tube, there is a semipermeable membrane that represents a cell membrane. complete the sentences. to model osmosis across a cell membrane, the scientists who created this model used a semipermeable membrane that dropdown water to pass through it. like a cell membrane, the membrane in the dropdown molecules to pass through it. the dropdown options for the first blank are: allows, does not allow. the dropdown options for the second blank are (not fully visible but related to molecule passage).

Explanation:

In osmosis, a semipermeable membrane (like a cell membrane) allows solvent (water) molecules to pass through but does not allow solute (e.g., salt) molecules to pass freely. The model’s membrane mimics this: water (solvent) can pass, solute (e.g., salt) molecules cannot. So the first blank (for water) is "allows", the second (for solute) is "does not allow".

Answer:

First blank: allows; Second blank: does not allow