What is a cell membrane?
Cell Membrane and Cell Transport

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Science, Biology
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The cell membrane is a biological membrane that separates and protects the interior of all cells from the outside environment. It is primarily composed of a phospholipid bilayer with embedded proteins.
2.
FLASHCARD QUESTION
Front
What are phospholipids?
Back
Phospholipids are a type of lipid molecule that is a major component of the cell membrane. They consist of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'.
3.
FLASHCARD QUESTION
Front
Define isotonic solution.
Back
An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water across the cell membrane.
4.
FLASHCARD QUESTION
Front
Define hypotonic solution.
Back
A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell, which may lead to cell swelling or bursting.
5.
FLASHCARD QUESTION
Front
Define hypertonic solution.
Back
A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell, which may lead to cell shrinkage.
6.
FLASHCARD QUESTION
Front
What is diffusion?
Back
Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration until equilibrium is reached.
7.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.
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