How Various Mechanisms By Which Substances Cross The Cell Me
Beginning of paper
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 ....
Middle of paper
.... a role in diffusion. Where
this is a pressure gradient there is motion of molecules. The pressure
gradient is a difference in pressure between two different points. If
the concentration of one side of the membrane is greater than the
molecules will travel from the higher to lower concentration.
Eventually there will be a dynamic equilibrium and there will be no net
movement of molecules from one side to the other.
Osmosis is the diffusion of water. Like diffusion, the water moves
....
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Word count: 886
Page count: 4 (approximately 250 words per page)
