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A cell builds needed molecules- they may be structural molecules, pigments, hormones or other signals
A gas exchange of oxygen for carbon dioxide occurs so that a cell may get the energy held in glucose molecules
observed a slice of cork with a compound microscope; used the word cell to describe the little boxes he saw
Anton Van Leeuwenhoek
observed pond water, sperm, and blood cells with a simple microscope; he did not know they were living cells
suggested that all living things were made up of cells, but did not understand the actual nature of living cells
-Means a cell can manufacture its own organic molecules
-This causes a cell to grow
-Biosynthesis occurs through this process
-A cell uses energy to carry molecules/ions across the cell membrane
-Secretions are packages and leave the cell this way
-cells can break down toxins, food molecules or even worn out cell parts
-water is needed for digestion to occur
-the cell does not need to use any of its own energy when molecules diffuse across the cell membrane
-wastes like oxygen and carbon dioxide leave the cell this way
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