Question

which of the following is specifically concerned with the transport of water across the cell membrane?
a osmosis
b diffusion
c facilitated diffusion

Explanation:

To solve this, we analyze each option:

• Option a: Osmosis is the movement of water molecules across a semi - permeable membrane (like the cell membrane) from an area of lower solute concentration to an area of higher solute concentration. This is specifically about water transport across the cell membrane.
• Option b: Diffusion is the movement of particles (such as gases, solutes) from an area of high concentration to an area of low concentration. It is not specifically for water transport across the cell membrane.
• Option c: Facilitated diffusion is the movement of molecules (usually larger or charged molecules) across the cell membrane with the help of transport proteins. It is not specifically related to water transport.

Answer:

a. osmosis