Imagine that you are studying cell structure in various organisms in your biology lab. Your instructor gives you a microscope slide showing two types of cells that have been suspended in pure water. One type of cell swells up until it bursts. The other cell maintains its shape throughout the experiment. Suggest an explanation for these observations; assume that both cells were alive at the start of the experiment. Assume also that the concentration of water inside both types of cells is similar.

+1 vote
    The cell that remained intact had a contractile vacuole for pumping out the excess water that entered the cell via osmosis.
    The cell that burst lacked gap junctions, so water that entered the cell via osmosis could not leak back out through the junctions.
    The cell that burst lacked a plasma membrane for regulating osmosis.
    The cell that remained intact had plasmodesmata that allowed the excess water to leak out, thus balancing the tendency of water to enter the cell via osmosis.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

+1 vote
The cell that remained intact had a contractile vacuole for pumping out the excess water that entered the cell via osmosis.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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