Acell is placed in an isotonic solution. how does the cell maintain homeostasis in this environment? a. there is no movement of water molecules into or out of the cell because the concentrations of solute particles inside and outside the cell are the same. b. water will move across the cell membrane to the inside of the cell because the cell has a higher concentration of solute particles than the solution. c. water will move across the cell membrane to the outside of the cell because the solution has a higher concentration of solute particles than the cell. d. water will move across the cell membrane in both directions because the concentrations of solute particles inside and outside the cell are the same.

If a cell is placed in an isotonic solution, such a cell will maintain homeostasis by allowing no net movement of water molecules in and out of the cell. The correct option would, therefore, be D.

Recall that: Homeostasis refers to the maintenance of a relatively constant internal physiological process.

An isotonic solution is a solution with an equal concentration of solute as that of the cytosol of a cell that is placed in it. Equal solute concentration between the cell and its surrounding solution means that the water potential in the cell and the surrounding solution is the same.

Because the concentrations of solute particles inside and outside of the cell are the same, water move across the membrane in both directions in equal proportion. Hence, the cell neither loses nor gains water.

More on isotonic solutions can be found here: link

 D. Water will move across the cell membrane in both directions because the concentrations of solute particles inside and outside the cell are the same.

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