AP Biology Unit 2 Review Qs

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•
Biology
•
12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is an isotonic solution?
Back
An isotonic solution has the same concentration of solutes as another solution, resulting in no net movement of water across a semipermeable membrane.
2.
FLASHCARD QUESTION
Front
What happens to red blood cells in a hypotonic solution?
Back
In a hypotonic solution, water enters red blood cells, causing them to swell and potentially burst (lyse).
3.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration.
4.
FLASHCARD QUESTION
Front
What is the role of contractile vacuoles in Paramecia?
Back
Contractile vacuoles in Paramecia expel excess water to maintain osmotic balance in a hypotonic environment.
5.
FLASHCARD QUESTION
Front
How does osmolarity affect the rate of water movement in cells?
Back
Higher osmolarity outside the cell leads to less water entering the cell, while lower osmolarity increases water influx.
6.
FLASHCARD QUESTION
Front
What is passive transport?
Back
Passive transport is the movement of substances across a cell membrane without the use of energy, typically down their concentration gradient.
7.
FLASHCARD QUESTION
Front
Give an example of passive transport. What is its significance?
Back
An example of passive transport is the movement of water through aquaporins. It is significant for maintaining cell homeostasis.
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