Cell Membrane and Transport

Front

Cell Membrane

Back

A flexible barrier that surrounds the cell, controlling what enters and exits the cell.

Front

Lipid Bilayer

Back

A double layer of phospholipids that makes up the cell membrane, providing structure and flexibility.

Front

Selectively Permeable

Back

The property of the cell membrane that allows it to control which substances can pass into or out of the cell based on their size and other characteristics.

Front

Protein Channels

Back

Proteins embedded in the cell membrane that form channels to allow specific molecules to pass through the membrane.

Front

Protein Receptors

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Proteins in the cell membrane that receive and transmit chemical signals from outside the cell to help regulate cellular processes.

Front

Dynamic Equilibrium

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A state in which the concentrations of molecules are balanced on both sides of the membrane, but molecules continue to move in and out of the cell.

Front

Diffusion

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The movement of molecules from an area of high concentration to an area of low concentration, driven by random motion, without the use of energy (ATP).

Front

Passive Transport

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The movement of molecules across the cell membrane without the use of energy (ATP), including processes like diffusion and osmosis.

Front

Concentration Gradient

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The difference in concentration of a substance between two areas. Molecules move from high to low concentration along the gradient.

Front

Osmosis

Back

The diffusion of water molecules across a selectively permeable membrane from an area of high water concentration to low water concentration, without energy (ATP).