Cell Transport

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What is cell transport?

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Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

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What is passive transport?

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

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What is active transport?

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Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP) to occur.

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What is osmosis?

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Osmosis is the diffusion of water across a selectively permeable membrane, moving from an area of lower solute concentration to an area of higher solute concentration.

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What is endocytosis?

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Endocytosis is the process by which cells engulf substances from the outside environment, allowing large particles to enter the cell.

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What is exocytosis?

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Exocytosis is the process by which cells expel materials to the outside environment, often involving the fusion of vesicles with the cell membrane.

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What are protein pumps?

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Protein pumps are integral membrane proteins that actively transport ions or molecules across the cell membrane against their concentration gradient.

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What is facilitated diffusion?

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Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane without energy.

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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 while blocking others, crucial for maintaining homeostasis in cells.

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What happens during diffusion?

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Diffusion occurs when particles move from an area of higher concentration to an area of lower concentration until equilibrium is reached.