THE CELL
STRUCTURE AND FUNCTION OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Red blood cells are placed in a beaker of pure water. Which is the most likely result of placing them in pure water?
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Water diffuses into the red blood cells by osmosis, and the cells eventually burst.
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Water diffuses out of the red blood cells by osmosis, and the cells shrink to about half their normal size.
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Water diffuses both in and out of the red blood cells, and the cells remain approximately the same size.
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Water diffuses both in and out of the red blood cells, and the cells alternately expand and shrink.
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Explanation:
Detailed explanation-1: -If a red blood cell is placed in water, water enters the cell by osmosis. Because the membrane is quite weak the cell will burst as the volume and therefore the pressure in the cellincreases. Red blood cells shrink whenplaced in concentrated solutions of sugar as water moves out of them by osmosis.
Detailed explanation-2: -When red blood cells are placed in pure water, water rapidly enters the cells by osmosis and causes the cells to burst by a phenomenon known as hemolysis.
Detailed explanation-3: -in beaker A. Water would move into the cells. The cells would swell and possibly burst. Water with very little salt is a hypotonic solution for the red blood cells.
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