Rodriguez Cell Membrane and Cell Transport Flashcard

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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. It occurs along the concentration gradient, from an area of higher concentration to an area of lower concentration.

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What is Active Transport?

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Active transport is the movement of substances across a cell membrane against the concentration gradient, requiring energy (ATP). It allows cells to uptake necessary molecules even when they are in lower concentrations outside the cell.

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What is Endocytosis?

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Endocytosis is a process by which a cell surrounds a molecule and absorbs it into the cell. This is done by engulfing the molecule with the cell membrane.

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What is Exocytosis?

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Exocytosis is the process by which a cell ejects a molecule by pinching off a vesicle containing the molecule, releasing it outside the cell.

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What is Homeostasis?

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Homeostasis is the ability of a cell or organism to maintain a stable internal environment despite changes in external conditions.

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What are the components of the Cell Theory?

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The Cell Theory states that: 1) All living things are made of cells, 2) Cells are the basic unit of structure and function in living things, 3) All cells come from pre-existing cells.

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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, providing protection and structural support.

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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 selectively permeable membrane?

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A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others, maintaining the internal environment of the cell.

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What is the difference between diffusion and osmosis?

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Diffusion is the movement of solute particles from an area of higher concentration to an area of lower concentration, while osmosis specifically refers to the movement of water across a selectively permeable membrane.