Cell Membrane and Cell Transport

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What is Active Transport?

Back

Active Transport is the movement of materials across a cell membrane against the concentration gradient, requiring energy (ATP).

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What is Passive Transport?

Back

Passive Transport is the movement of materials across a cell membrane without the use of energy, following the concentration gradient.

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What is Equilibrium in the context of diffusion?

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Equilibrium is the state reached when the concentration of molecules is equal throughout a space, resulting in no net movement of molecules.

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What is the Concentration Gradient?

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The Concentration Gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion.

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What is Osmosis?

Back

Osmosis is the passive transport 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 a Selectively Permeable Membrane?

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A Selectively Permeable Membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

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What is the role of ATP in Active Transport?

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ATP provides the energy required for Active Transport to move molecules against their concentration gradient.

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What is Diffusion?

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Diffusion is the passive 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 Hypertonicity?

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Hypertonicity refers to a solution that has a higher concentration of solutes compared to another solution, often causing cells to lose water.

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What is Hypotonicity?

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Hypotonicity refers to a solution that has a lower concentration of solutes compared to another solution, often causing cells to gain water.