Choose the element whose ion has the largest concentration inside a human cell.
A)Li
B)Na
C)K
D)Rb
E)Cs

Question

Quizplus · Accepted Answer

Potassium (K) is the most abundant intracellular ion in humans, with a concentration of about 140 mM. Sodium (Na) and lithium (Li) are also present in cells but at much lower concentrations of about 15 mM and less than 1 mM, respectively. Rubidium (Rb) and cesium (Cs) are not essential elements for humans and are not typically found in cells at significant concentrations.

Choose the Element Whose Ion Has the Largest Concentration Inside