Cellular Transport Honors Bio Practice

Flashcard
•
Science
•
9th - 10th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What do the phosphate heads in a phospholipid bilayer represent?
Back
Phosphate heads are hydrophilic (water-attracting) components of the phospholipid bilayer.
2.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is the process by which particles, like macromolecules, move across the cell membrane with the help of channel proteins, without the use of energy.
3.
FLASHCARD QUESTION
Front
Define concentration gradient.
Back
A concentration gradient is the difference in the concentration of a substance from one location to another.
4.
FLASHCARD QUESTION
Front
What does it mean for a cell membrane to be semipermeable?
Back
A semipermeable membrane allows certain substances to pass through while restricting others.
5.
FLASHCARD QUESTION
Front
What is simple diffusion?
Back
Simple diffusion is the movement of small molecules, such as oxygen and carbon dioxide, across the plasma membrane along the concentration gradient without the need for energy.
6.
FLASHCARD QUESTION
Front
What role do channel proteins play in cellular transport?
Back
Channel proteins facilitate the movement of larger or charged particles across the cell membrane.
7.
FLASHCARD QUESTION
Front
What is the significance of the hydrophobic tails in phospholipids?
Back
The hydrophobic tails are water-repelling components that help form the barrier of the cell membrane.
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