Cell Transport & Homeostasis

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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, using energy 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 a cell membrane without the use of energy, typically from an area of higher concentration to an area of lower concentration.

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Define 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 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 without using energy.

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What is a Phospholipid Bilayer?

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The Phospholipid Bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier to most water-soluble substances.

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What is a Hypertonic Solution?

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A Hypertonic Solution is a solution that has a higher concentration of solutes compared to another solution, leading to the movement of water out of the cell.

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What is a Hypotonic Solution?

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A Hypotonic Solution is a solution that has a lower concentration of solutes compared to another solution, causing water to move into the cell.

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What is an Isotonic Solution?

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An Isotonic Solution is a solution that has the same concentration of solutes as another solution, resulting in no net movement of water.

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What role does the Cell Membrane play?

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The Cell Membrane regulates what enters and exits the cell, maintaining homeostasis by controlling the movement of substances.

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What is Homeostasis?

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Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.