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 molecules across the cell membrane without the use of energy, typically moving from an area of high concentration to an area of low concentration.

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What is active transport?

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Active transport is the movement of molecules across the cell membrane against their concentration gradient, requiring energy (usually in the form of ATP).

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What is facilitated diffusion?

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Facilitated diffusion is a type of passive transport that uses protein channels to help move molecules across the cell membrane.

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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 low solute concentration to an area of high solute concentration.

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What is the role of protein pumps in active transport?

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Protein pumps are integral membrane proteins that use energy to transport ions or molecules against their concentration gradient.

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What is endocytosis?

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Endocytosis is the process by which cells engulf substances from the outside environment, forming a vesicle to bring them into the cell.

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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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How does the cell membrane maintain homeostasis?

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The cell membrane maintains homeostasis by controlling the movement of substances in and out of the cell, ensuring a stable internal environment.

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What is the lipid bilayer?

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The lipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier to most water-soluble substances.