(Assume you are observing different types of cells under a microscope.) 1. If yo
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Question
(Assume you are observing different types of cells under a microscope.)
1. If you were observing plant cells, bathed in a solution that is hypertonic to the interior of the cells, would you expect to see plant cells that are turgid, flaccid, or plasmolyzed?
2. If you were observing animal cells, bathed in a solution that is hypotonic to the interior of the cells, would you expect to see animal cells that are swollen/lysed, normal, or shriveled?
(For the following two questions, describe the solution in terms of tonicity (hypotonic, hypertonic, or isotonic). Remember that tonicity is a relative description, you must describe the solutions tonicity relative to the other solution.)
3. If you were observing plant cells, and the cells were flaccid, what solution would you add to the cells to make them turgid?
4. If you were observing animal cells, and the cells were shriveled, what steps should you take to make the cells physiologically normal, and then maintain them in this condition? [Think about this carefully, the question is more complicated than you might think at first.]
Explanation / Answer
1. We would expect to see plant cells that are plasmolyzed. Water moves from cell to surrounding solution to equilibrate solute concentration. So, water moves outside leading to plasmolysis.
2. We would expect to observe animal cell that are swollen/lysed. In cells kept in hypotonic solution water moves inside the cell resulting in cell swelling.
3. In flaccid, cells are kept in isotonic solution. In order to make them turgid we must add hypotonic solution.
4. Cells were shrivelled that means they kept in hypertonic solution. To make the cells physiologically normal, I add hypotonic solution. After cell reaching normal size, I add isotonic solution to maintain them in normal condition.
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