Cellular Transport

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What is cellular transport?

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Cellular 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 active transport?

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Active transport is the process by which cells move substances against their concentration gradient, requiring energy input, usually in the form of ATP.

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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 osmosis?

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Osmosis is the diffusion of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high 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 facilitated diffusion?

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

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What role does ATP play in cellular transport?

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ATP provides the energy required for active transport processes, allowing cells to move substances against their concentration gradients.

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What is a semipermeable membrane?

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A semipermeable membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining cellular homeostasis.

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What is an example of active transport?

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An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

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What is an example of passive transport?

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An example of passive transport is the movement of oxygen and carbon dioxide across the cell membrane through simple diffusion.