Membrane Structure and Function
Flashcard
•
Biology
•
9th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does it mean for a membrane to be selectively permeable?
Back
A selectively permeable membrane allows certain substances to pass through while keeping others out, regulating the internal environment of the cell.
2.
FLASHCARD QUESTION
Front
What process moves waste products out of the cell?
Back
Exocytosis is the process by which waste products are expelled from the cell.
3.
FLASHCARD QUESTION
Front
What happens to a cell in an isotonic solution?
Back
A cell in an isotonic solution will stay the same size because the concentration of solutes is equal inside and outside the cell.
4.
FLASHCARD QUESTION
Front
What is the role of cholesterol in the cell membrane?
Back
Cholesterol molecules help to alter the fluidity of the membrane, making it more stable.
5.
FLASHCARD QUESTION
Front
What macromolecule primarily makes up the cell membrane?
Back
The majority of the cell membrane is made of lipids.
6.
FLASHCARD QUESTION
Front
Define diffusion in the context of cell membranes.
Back
Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration across a membrane.
7.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water across a selectively permeable membrane.
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