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How Various Mechanisms By Which Substances Cross The Cell Me
Homeostasis is essential to the cell’s survival. The cell membrane is
responsible for homeostasis. The membrane has a selective permeability
which means what moves in and out of the cell is regulated. Amino
acids, sugars, oxygen, sodium, and potassium are examples of substances
that enter the cell. Waste products and carbon dioxide are removed from
the cell. All of these substances cross the membrane in a variety of
ways. From diffusion and osmosis, to active transport the traffic
through the cell membrane is regulated.
Diffusion is the movement of molecules form one area of higher
concentration to an area of lowe ....
Word count: 886 - Page count: 4
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