Tranpsort in cells

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4 Terms

1

What is diffusion?

The movement of molecules (e.g., oxygen, carbon dioxide) from an area of high concentration to an area of low concentration, down the concentration gradient.

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2

What is osmosis?

The diffusion of water through a partially permeable membrane from an area of high water concentration to an area of low water concentration.

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3

What is active transport?

The movement of molecules from an area of low concentration to an area of high concentration, against the concentration gradient, requiring energy (ATP).

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4

What is ATP

ATP, or adenosine triphosphate, is like a battery for cells. It stores energy that cells need to do their work. When cells need energy, they break a part of ATP to release that energy, kind of like using up power from a battery.

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