active and passive transport

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•
Science
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).
2.
FLASHCARD QUESTION
Front
What is passive transport?
Back
Passive transport is the movement of molecules across a cell membrane without the use of energy, occurring along the concentration gradient.
3.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water molecules across a semipermeable membrane from an area of high water concentration to an area of low water concentration.
4.
FLASHCARD QUESTION
Front
What is diffusion?
Back
Diffusion is the net movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.
5.
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 without energy.
6.
FLASHCARD QUESTION
Front
What is endocytosis?
Back
Endocytosis is the process by which cells absorb external substances by engulfing them in a membrane.
7.
FLASHCARD QUESTION
Front
What is exocytosis?
Back
Exocytosis is the process by which cells expel materials in vesicles that fuse with the cell membrane.
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