The major reason that the apparent diffusion coefficient of Ca²⁺ in muscle cell cytosol is much lower than in water is that A) The cytosol is more viscous than water B) The re are obstacles to the free movement of Ca²⁺ in the cytosol that aren't present in water C) Cytosol contains fixed proteins that bind Ca²⁺, slowing its movement D) The cytosol moves most electrolytes, but not Ca²⁺, around by convection E) Ca²⁺ causes solidification or gelling of the cytosol

Question

Quizplus · Accepted Answer

The presence of fixed proteins in the cytosol that bind Ca²⁺ reduces its mobility, leading to a lower apparent diffusion coefficient compared to water.

The Major Reason That the Apparent Diffusion Coefficient of Ca2+

The Major Reason That the Apparent Diffusion Coefficient of Ca²⁺