PATHOLOGY

Detailed explanation-1: -Osmosis is a form of passive transport when water molecules move from low solute concentration(high water concentration) to high solute or low water concentration across a membrane that is not permeable to the solute. There is a form of passive transport called facilitated diffusion.

Detailed explanation-2: -Osmosis is passive diffusion. In osmosis, water moves from high concentration to low concentration through a semi-permeable membrane. Osmosis does not require energy, i.e. ATP for the movement.

Detailed explanation-3: -Active transport requires energy for the movement of molecules whereas passive transport does not require energy for the movement of molecules. In active transport, the molecules move against the concentration gradient whereas in passive transport, the molecules move along the concentration gradient.