Question

it is small enough to slip through tiny gaps between lipids in the bilayer. now, back to diffusion. this is the key thing to realize: if the solution on one side of the membrane has a higher concentration of dissolved substances than the other, it means it has a lower concentration of water molecules. water will move across the membrane from areas of high water concentration to areas of low water concentration. suppose this diagram represents the inside of a cell, the cell membrane, and the outside of a cell. if the pink balls represent amino acids, it makes sense that they would be at higher concentration on the inside than the outside. for reasons youll explore soon, amino acids cannot cross a lipid bilayer like the cell membrane on their own, but water can. based on this scenario, choose all of the following statements that are correct. water molecules will move back and forth due to their kinetic energy, but there will be no net change in terms of total water movement. water molecules are at the same concentration in every solution—including inside and outside this cell. water molecules are at higher concentration inside this cell than outside. water will diffuse from outside the cell to the inside. to get a feel for how osmosis works, team up with a study partner or partners and draw different scenarios for each other—sketches showing solutions with different or same concentration of solutes (dissolved substances) on each side. then challenge each other to figure out whether water is going to move, and if so, in which direction.

Explanation:

The text describes osmosis - water moves from areas of high water concentration to low water concentration across a semi - permeable membrane (lipid bilayer in this case). Since there are more dissolved substances (amino acids) inside the cell, water concentration is lower inside and higher outside. Water will diffuse from outside to inside. Water molecules are in constant motion due to kinetic energy, but there will be a net movement.

Answer:

Water will diffuse from outside the cell to the inside.