Explore Cellular Transport Mechanisms

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What is active transport?

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

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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, occurring along the concentration gradient.

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What are the three types of passive transport?

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The three types of passive transport are diffusion, osmosis, and facilitated diffusion.

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What is osmosis?

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Osmosis is the diffusion of water molecules through 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 movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

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What is facilitated diffusion?

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Facilitated diffusion is the process by which molecules pass through the cell membrane via special protein channels, without the use of energy.

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What is the function of the cell membrane?

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The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

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What is endocytosis?

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

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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.

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What is the difference between active and passive transport?

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Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.