
Biology - Osmosis/Diffusion
Flashcard
•
Biology
•
KG - University
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the movement of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.
2.
FLASHCARD QUESTION
Front
What is diffusion?
Back
Diffusion is the movement of particles from an area of high concentration to an area of low concentration until equilibrium is reached.
3.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is a process by which substances move across cell membranes with the assistance of special proteins called channel proteins.
4.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the energy-requiring process that moves material across a cell membrane against a concentration gradient, using ATP.
5.
FLASHCARD QUESTION
Front
What does it mean if a membrane is permeable?
Back
If a membrane is permeable, it means that substances can pass through it.
6.
FLASHCARD QUESTION
Front
What is a concentration gradient?
Back
A concentration gradient is the difference in the concentration of a substance across a space.
7.
FLASHCARD QUESTION
Front
What role do channel proteins play in cellular transport?
Back
Channel proteins facilitate the movement of specific molecules across the cell membrane during facilitated diffusion.
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