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 passive or active mechanisms.

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What is osmosis?

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

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What is diffusion?

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Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached.

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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 (ATP) to move molecules from low to high concentration.

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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 endocytosis?

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Endocytosis is a type of active transport where a cell engulfs large particles or fluids, bringing them into the cell.

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What is exocytosis?

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Exocytosis is the process by which a cell expels materials in vesicles, releasing them outside the cell.

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What are channel proteins?

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Channel proteins are integral membrane proteins that facilitate the transport of ions and molecules across the cell membrane.

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What are phospholipids?

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Phospholipids are molecules that make up the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

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What is a marker protein?

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Marker proteins are proteins on the cell surface that help identify the cell type and are involved in cell recognition.