Cell Transport

Flashcard
•
Biology
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is the process of passive transport of molecules across a cell membrane via the aid of a transmembrane protein. It allows substances to move from an area of high concentration to an area of low concentration without the use of energy.
2.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water across a selectively permeable membrane, moving from an area of low solute concentration to an area of high solute concentration.
3.
FLASHCARD QUESTION
Front
What does semi-permeable mean?
Back
A semi-permeable membrane allows certain substances to pass through while blocking others. For example, the cell membrane allows water, oxygen, and carbon dioxide to pass but blocks larger molecules.
4.
FLASHCARD QUESTION
Front
What is the role of the cell wall in plant cells?
Back
The cell wall provides structural support and protection to plant cells. It helps maintain the shape of the cell and prevents it from bursting in hypotonic environments.
5.
FLASHCARD QUESTION
Front
What happens to a red blood cell in pure water?
Back
A red blood cell will swell and potentially burst in pure water due to the influx of water, as it is in a hypotonic solution.
6.
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, using energy (ATP) and carrier proteins.
7.
FLASHCARD QUESTION
Front
What is the difference between diffusion and facilitated diffusion?
Back
Diffusion is the movement of molecules from high to low concentration without the need for a protein, while facilitated diffusion requires a protein to help transport molecules across the membrane.
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