Cell Membrane and Transport

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What is Passive Transport?

Back

The movement of substances across the cell membrane without the expenditure of energy. It includes diffusion, osmosis, and facilitated diffusion.

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What is Cholesterol in the context of cell membranes?

Back

A lipid molecule found within the phospholipid bilayer, which helps maintain the membrane's fluidity and stability.

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What is the Cell Membrane?

Back

A semi-permeable barrier that encloses the cell and separates its internal environment from the external surroundings.

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What is Diffusion?

Back

The passive movement of molecules from areas of high concentration to areas of low concentration until equilibrium is reached.

Front

What is the Phospholipid Bilayer?

Back

A double layer of phospholipid molecules that makes up the basic structure of the cell membrane.

Front

What is Osmosis?

Back

A specific type of diffusion involving the movement of water molecules across a selectively permeable membrane.

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What are Peripheral Proteins?

Back

Proteins that are loosely attached to the membrane's surface and play various roles in cell signaling, structure, and transport.

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What is Facilitated Diffusion?

Back

The process of passive transport of molecules across the cell membrane via the aid of membrane proteins.

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What is Active Transport?

Back

The energy-dependent movement of molecules against their concentration gradient.

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What is a Selectively Permeable Membrane?

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A membrane that allows certain molecules to pass through while blocking others.