Membrane Permeability
a. What molecule makes up the majority of the cell membrane and how does its structure create the semi-permeable nature of the membrane?
b. For each of the following molecules describe whether or not it can freely diffuse across a cell membrane. Justify your answers.
RNA, Cholesterol, Carbon Dioxide (CO2), Sodium ions (Na+),
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Membrane Permeability a. What molecule makes up the majority of the cell membrane and how does...
When a nerve cell is stimulated electrically, mechanically, or chemically, the permeability of the cell membrane changes and sodium ions (Na+) can diffuse more readily into the cell. If 1.5 x 106 Na+ ions move through the membrane in 5.0 ms, what is the corresponding electric current?
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