Sodium,potassium,and Calcium Ions Pass Through the Cell Membrane by

Sodium,potassium,and calcium ions pass through the cell membrane by

A) diffusion after first dissolving in the phospholipid layer.
B) active transport by carrier molecules against their concentration gradient
C) being transported by carrier molecules.
D) diffusion after first dissolving in enzyme molecules.
E) diffusion after first dissolving in the phospholipid layer and diffusion through open membrane channels.