A plant cell with a Cs of -0.65 MPa maintains a constant volume when bathed in a solution that has a Cs of -0.30 MPa and is in an open container. The cell has a ________.

Question

Quizplus · Accepted Answer

The cell maintains a constant volume when the osmotic pressure inside the cell (Cs) and the pressure potential (Cp) together balance the solute potential of the solution outside. Since the cell's solute potential (Cs) is -0.65 MPa and it does not change volume in a solution of -0.30 MPa, the pressure potential (Cp) must be making up the difference to balance the external solute potential. The difference is 0.35 MPa, making the cell's pressure potential +0.35 MPa to achieve equilibrium.

A Plant Cell with a Cs of -0