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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