What is the cell membrane?
Cell Membrane and Cell Transport

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•
Biology
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The cell membrane is a biological barrier that separates the interior of the cell from the external environment, controlling the movement of substances in and out.
2.
FLASHCARD QUESTION
Front
What is passive transport?
Back
Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.
3.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).
4.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane.
5.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
6.
FLASHCARD QUESTION
Front
What is an isotonic solution?
Back
An isotonic solution is a solution where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.
7.
FLASHCARD QUESTION
Front
What is endocytosis?
Back
Endocytosis is the process by which cells take in materials by engulfing them in a vesicle.
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