Cell Transport Mechanisms: Diffusion and Osmosis

Movement of molecules from an area of higher concentration to an area of lower concentration.

The diffusion of water molecules across a semi-permeable membrane from a region of higher water concentration to a region of lower water concentration.

A solution with a higher concentration of solutes compared to another solution.

A solution with a lower concentration of solutes compared to another solution.

A solution with the same concentration of solutes as another solution.

Movement of molecules across a cell membrane from a region of high concentration to a region of low concentration without requiring any energy.

The movement of molecules across a cell membrane from a region of high concentration to low concentration with the help of transport proteins.

A type of passive transport where substances move across a cell membrane from a region of high concentration to a region of low concentration without requiring energy.

The state where the concentration of a substance is equal on both sides of a membrane and there is no net movement of the substance.

The ability of a surrounding solution to cause a cell to gain or lose water due to the difference in solute concentration.

In an isotonic solution, water molecules move at the same rate in both directions.

Water moves from a hypotonic solution to a hypertonic solution.

The concentration of solutes in fluids determines the tonicity of a solution.

The relative concentration of solutes in fluids separated by a selectively permeable membrane.

A solution where water moves out of the cell, causing the cell to shrink.

A solution where water moves into the cell, causing the cell to swell.

A solution where the solute concentration is the same inside and outside the cell, so there is no net movement of water.

The passive movement of molecules from an area of higher concentration to an area of lower concentration.

The diffusion of water molecules across a selectively permeable membrane from a region of higher water concentration to a region of lower water concentration.

The movement of molecules across a membrane with the help of channel or carrier proteins.

The movement of molecules across a membrane without using energy.

A cell placed in a hypotonic solution may swell or burst due to the influx of water. The cell's internal pressure rises to a point where it can no longer hold the extra water.

A cell placed in a hypertonic solution will lose water and shrink. The cell's internal pressure decreases as water moves out.

Plant cells do not experience significant changes in size when placed in different water concentrations due to their rigid cell walls which provide structural support.

Marine animals drink water but excrete salts across their gills because they live in a hypertonic environment. They need to drink water to compensate for the water loss through osmosis and excrete salts to maintain their internal osmotic balance.