What is the function of a protein channel in the cell membrane?
Cell Membrane & Cell Transport

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Biology
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9th - 10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Protein channels facilitate the transport of specific substances across the cell membrane, allowing molecules that cannot pass through the lipid bilayer to enter or exit the cell.
2.
FLASHCARD QUESTION
Front
Define osmosis.
Back
Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
3.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is the process by which substances move across the cell membrane with the help of transport proteins, without the use of energy.
4.
FLASHCARD QUESTION
Front
What is the difference between active transport and passive transport?
Back
Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.
5.
FLASHCARD QUESTION
Front
What does it mean for a solution to be hypertonic?
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, leading to cell shrinkage.
6.
FLASHCARD QUESTION
Front
What is a peripheral protein?
Back
Peripheral proteins are proteins that are attached to the exterior or interior surfaces of the cell membrane and play roles in signaling and maintaining the cell's shape.
7.
FLASHCARD QUESTION
Front
What role do receptor proteins play in the cell membrane?
Back
Receptor proteins bind to specific molecules (ligands) outside the cell, triggering a response inside the cell, such as a change in cellular activity.
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