What describes the process of osmosis?

The process of osmosis is specifically defined as the movement of water across a semi-permeable membrane. This movement occurs from an area of lower solute concentration to an area of higher solute concentration. The goal of this movement is to achieve equilibrium on both sides of the membrane regarding solute concentration.

In the context of osmosis, the semi-permeable membrane allows water molecules to pass through while preventing certain solutes from doing so. When there is a difference in solute concentration across the membrane, water moves toward the area with a higher concentration of solutes to dilute it, thereby balancing concentrations on both sides.

The choice that states "Movement of water across a semi-permeable membrane from high to low solute concentration" correctly captures this essential characteristic of osmosis, highlighting the direction of water movement in relation to solute concentration. This process is vital for maintaining cellular homeostasis and influences various physiological functions in the human body.