Question

1. sometimes large molecules that cannot cross a membrane develop a very high concentration on one side of the membrane. what is the name of the process where water spontaneously crosses the membrane going from relatively lower to higher concentration of these molecules?

diffusion

filtration

osmosis

facilitated diffusion

Explanation:

• Diffusion is the general movement of solutes from high to low concentration, not water movement relative to large solutes.
• Filtration relies on pressure to push substances through a membrane, not spontaneous water movement due to solute concentration.
• Osmosis specifically describes the spontaneous movement of water across a semipermeable membrane from an area of lower non-penetrating solute concentration to higher non-penetrating solute concentration, matching the question's description.
• Facilitated diffusion is the movement of solutes through membrane proteins, not water movement driven by solute gradients.

Answer:

osmosis