Chapter 2 Lesson 4 Cell in its environment
Flashcard
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Science
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7th - 8th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the function of the cell membrane?
Back
The cell membrane is selectively permeable, controlling what enters and leaves the cell.
2.
FLASHCARD QUESTION
Front
Define homeostasis in the context of cellular function.
Back
Homeostasis is the process by which a cell regulates its internal environment to maintain stable, constant conditions necessary for survival.
3.
FLASHCARD QUESTION
Front
What happens to a cell placed in a hypertonic solution, such as salt water?
Back
The cell will lose water and shrink due to osmosis.
4.
FLASHCARD QUESTION
Front
What is the difference between active transport and passive transport?
Back
Active transport requires energy to move molecules against their concentration gradient, while passive transport does not require energy and moves molecules from high to low concentration.
5.
FLASHCARD QUESTION
Front
What role do proteins play in the cell membrane?
Back
Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.
6.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.
7.
FLASHCARD QUESTION
Front
Explain the term 'selectively permeable'.
Back
Selectively permeable refers to a membrane that allows certain molecules to pass through while blocking others.
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