Diffusion and Osmosis

Flashcard
•
Biology
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is diffusion?
Back
Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until they are evenly distributed.
2.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.
3.
FLASHCARD QUESTION
Front
What is a concentration gradient?
Back
A concentration gradient is the difference in the concentration of a substance between two areas.
4.
FLASHCARD QUESTION
Front
What does it mean when a cell is in equilibrium?
Back
A cell is in equilibrium when the concentration of molecules is the same inside and outside the cell, resulting in no net movement of molecules.
5.
FLASHCARD QUESTION
Front
What is homeostasis?
Back
Homeostasis is the ability of an organism or cell to maintain a stable internal environment despite changes in external conditions.
6.
FLASHCARD QUESTION
Front
What is passive transport?
Back
Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.
7.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the movement of substances against their concentration gradient, requiring energy (ATP) to do so.
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