Cellular Processes

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What is Facilitated Diffusion?

Back

Facilitated diffusion is the process by which molecules move across the cell membrane from an area of high concentration to an area of low concentration with the help of a carrier protein.

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What is Active Transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy in the form of ATP.

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What is Endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a membrane, forming a vesicle.

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What is Osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

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What is the main difference between diffusion and facilitated diffusion?

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Facilitated diffusion requires the help of a protein to transport molecules, whereas diffusion allows molecules to move directly across the membrane without assistance.

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What is Passive Transport?

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Passive transport is the movement of molecules across a cell membrane without the use of energy, typically along the concentration gradient.

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What is the role of ATP in Active Transport?

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ATP provides the energy required for active transport to move molecules against their concentration gradient.

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What is Exocytosis?

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Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

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What is the concentration gradient?

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The concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules.

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What is a selectively permeable membrane?

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A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.