Healing Unit Exam Review

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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 membrane. It allows cells to absorb large molecules or particles.

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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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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 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 a Vacuole?

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A vacuole is a membrane-bound organelle that stores substances such as water, nutrients, or waste products in both plant and animal cells.

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What is Selective Permeability?

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Selective permeability is the property of a cell membrane that allows certain molecules to pass through while blocking others.

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What is the Sodium-Potassium Pump?

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The sodium-potassium pump is a type of active transport that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

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What is Passive Transport?

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Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

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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 is Equilibrium in the context of diffusion?

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Equilibrium is the state reached when the concentration of molecules is equal on both sides of a membrane, resulting in no net movement.