maryanne021 maryanne021 13-05-2023 Medicine contestada Which of the following ions is involved in signaling within the cytoplasm (i.e., is a second messenger)? (A) Sodium (Na+) (B) Potassium (K+) (C) Calcium (Ca2+) (D) Chloride (Cl−) (E) Bicarbonate (HCO3−)