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The Diffusion Coefficient of Na+, K+ and Many More Solutes

Question 10

Multiple Choice

The diffusion coefficient of Na+, K+ and many more solutes is slower in cytosol than in water because


A) The cytosol is more viscous than water
B) There are obstacles to the free movement of ions in the cytosol that aren’t present in water
C) Cytosol contains fixed proteins that bind ions, slowing their movem ent
D) The cytosol moves most electrolytes around by convection
E) Ca2+ causes solidification or gelling of the cytosol

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