BIOL 4160 Chapter : Power Point 1
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Understanding why a cells charge is negative. - potassium leaks out more than other ions leak in. The cell has to be extremely positive for sodium to not leak in. Ek is negative because it is how negative the cell has to be to keep potassium from leaving. Comparing the outside and inside of the cells. Slide 5- same tation of ions outside and outside sodium is the main cation outside for vertabrates and inside potassium is the main ion. Difference between sodium atom and ion is the ion has a positive charge. Side change decides the charge of the amino acid. Slide 6- numbers in milimolar . 15 molar= 150 millimolar. There is a greater probability that potassium will leak out of a cell than into one, proteins (which are potassium"s anions) can"t leak through the pores therefore the. When cell has reached it"s ek the cell will be positive on the outside and negative on cell is becoming more negative.
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