Which student’s analogy is a better representation of the cell membrane? Options: Solid brick wall; the cell membrane keeps everything out of the cell to keep the cell healthy. Solid brick wall; the cell membrane is very thick and rigid. Fence with gates; the cell membrane is easy to break through and releases wastes through gates. Fence with gates; the cell membrane allows particles to diffuse or travel through designated areas.
LMS Cell Membrane Practice

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Science
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7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Fence with gates; the cell membrane allows particles to diffuse or travel through designated areas.
2.
FLASHCARD QUESTION
Front
Dylan is conducting an experiment in science class. The teacher gave Dylan a raw egg with the shell removed. Without the shell, Dylan observes that the egg is surrounded by a membrane. Dylan gently placed the egg into a solution. What will happen to the egg?
Back
The egg will shrink because water molecules will move out of the egg until the concentrations are equal.
3.
FLASHCARD QUESTION
Front
What change in the cells occurred during the six hours the cells remained undisturbed?
Back
Osmosis occurred in the salt water cell sample because the water from inside the cell moved out of the cell to a lower concentration, causing the cell to shrink.
4.
FLASHCARD QUESTION
Front
The diagram shows oxygen moving into an animal cell. Which statement best describes the cell after this process has occurred?
- A The concentration of oxygen will be higher inside the cell compared to outside the cell.
- B The concentration of oxygen will be lower inside the cell compared to outside the cell.
- C The concentration of oxygen inside and outside the cell will be nearly equal.
- D The concentration of oxygen inside the cell will be minimal or zero.
Back
The concentration of oxygen inside and outside the cell will be nearly equal.
5.
FLASHCARD QUESTION
Front
A cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell?
Back
The cell will remain the same size.
6.
FLASHCARD QUESTION
Front
A cell was placed in a solution with the same concentration as inside the cell, and it did not change size. This is because the cell was in _________ with its environment.
Back
Equilibrium
7.
FLASHCARD QUESTION
Front
What is the primary function of the cell membrane in controlling the movement of substances?
Back
To selectively allow certain substances to pass through while blocking others.
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