The concentration of calcium ions in the ER lumen, the plant cell vacuole and the extracellular space are on average more than _______ times higher than in the cytosol.
A)10
B)100
C)1,000
D)10,000
E)1,000,000

Question

Quizplus · Accepted Answer

The concentration of calcium ions in the ER lumen, the plant cell vacuole, and the extracellular space is on average more than 10,000 times higher than in the cytosol. This is due to the important roles of calcium ions in signal transduction and regulation of cellular processes, making it necessary to maintain such high concentrations in specific compartments.

The Concentration of Calcium Ions in the ER Lumen, the Plant