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alexdok
9 days ago
8

Some students used vinegar to dissolve away the shells of three eggs and used these eggs as models of human red blood cells. The

students observed the changes in the eggs when they were placed in different solutions.
Which statement best describes the role of the cell membrane in this model?
answer choices
A) The cell membrane is an impermeable barrier that prevents water from entering the cell.
B) The cell membrane allows solutes to enter the cell, which causes the cell to shrink.
C) The cell membrane allows water to enter and leave the cell.
D) The cell membrane removes solutes from the environment.
Biology
1 answer:
11111nata11111 [1.8K]9 days ago
6 0

Answer:

C) The cell membrane facilitates the entry and exit of water in and out of the cell.

Explanation:

The cell membrane is selectively permeable, allowing specific small and non-polar substances to pass through. Water molecules can freely move across the cell membrane based on the concentration gradient. After removing the shells, the membrane acts as the outer covering of eggs.

Depending on the solution the cells are placed in, water will either move into or out of the cells, influenced by the concentration gradient. In a hypotonic solution, water enters the egg cell, leading to an increase in its volume. Conversely, when the egg cell is in a hypertonic solution, water exits through the cell membrane, causing the egg to shrink. This passive movement of water through the cell membrane is referred to as osmosis.

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