Cell Membrane and Transport

Flashcard
•
Science
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the cell membrane?
Back
The cell membrane is a biological barrier that separates the interior of a cell from its external environment, composed mainly of a phospholipid bilayer with embedded proteins.
2.
FLASHCARD QUESTION
Front
What are transport proteins?
Back
Transport proteins are proteins that assist in the movement of ions and molecules across the cell membrane, facilitating the transport of substances that cannot pass freely through the lipid bilayer.
3.
FLASHCARD QUESTION
Front
What type of molecules require the help of transport proteins to pass through the cell membrane?
Back
Polar molecules require the help of transport proteins to pass through the cell membrane.
4.
FLASHCARD QUESTION
Front
What is endocytosis?
Back
Endocytosis is the process by which cells take in large molecules or particles by engulfing them with the cell membrane, forming a vesicle.
5.
FLASHCARD QUESTION
Front
What is exocytosis?
Back
Exocytosis is the process by which cells expel large molecules or particles by fusing vesicles with the cell membrane, releasing their contents outside the cell.
6.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy (usually in the form of ATP).
7.
FLASHCARD QUESTION
Front
What is simple diffusion?
Back
Simple diffusion is the passive movement of small non-polar molecules across the cell membrane from an area of higher concentration to an area of lower concentration without the need for energy.
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