A section of a cell membrane Is shown in the diagram below.CELL MEMBRANELow Concentrationof SubstancesOutside CellCellMembraneInside CellHigh Concentrationof SubstancesWhich type of membrane transport by a carrier proteln is most likely shown in the diagram if energy is NOT being used?osmosissimple diffusionactive transportfacilitated diffusionDirection of Substance Movement

Osmosis is defined as solvent movement across a semipermeable membrane from a low concentration to a high concentration of solute. In the majority of living systems, the solvent is usually water, but osmosis may occur in other liquids, supercritical liquids, and also in gases. Hence option (a) is incorrect. Simple diffusion is a mechanism in which solutes move following a concentration gradient in a solution or cross a semipermeable membrane. It is carried out by the role of hydrogen bonds made between water molecules and solutes Hence option (b) is incorrect. The active transport is explained as the transport of molecules across a membrane of the cell from an area of lower concentration to an area of a higher concentration, which is against the concentration gradient. It needs cellular energy to perform this movement. Hence option (c) is incorrect. Facilitated diffusion is a kind of passive transportation in which substances are transported across the cell membrane by the helper proteins. It is a subtype of passive transport and needs no energy to occur. In the diffusion mechanism, the substances are transported from areas of high concentration to regions of low concentration. Hence the diagram shows the facilitated diffusion (d).