ANATOMY

Detailed explanation-1: -The correct answer is (d) Facilitated diffusion. Facilitated diffusion occurs when a substance moves down its concentration gradient through protein channels in a membrane. In this case, sodium will move down its concentration gradient through the sodium channels present in the synthetic membrane.

Detailed explanation-2: -The solute is the substance that is dissolved. The solvent is what is the substance is dissolved in. Example: dissolving salt in water. Salt is the solute and water is the solvent.

Detailed explanation-3: -Osmosis is the transport of a solvent through a semipermeable membrane that separates two solutions of differing solute concentration. During osmosis, the solvent moves from the solution that is lower in solute concentration to the solution that is higher in solute concentration.

Detailed explanation-4: -Osmosis describes the diffusion of the solvent through a semipermeable membrane. The driving force of the solvent shift is the concentration difference of solutes in the solutions separated by the semipermeable membrane. In contrast to solvent, solutes cannot pass this barrier.