Low calcium levels, which can cause certain excitable cells to be... more excitable, which result in tetany, muscle spasms, and cardiac dysfunction.

钙水平低，会导致某些可兴奋细胞变得更容易兴奋，可导致抽搐、肌肉痉挛和心脏功能障碍等。

This concentration gradient is extremely important for setting the resting membrane potential of excitable cell membranes, which is needed for normal contraction of smooth, cardiac, and skeletal muscle.

电化学梯度在可兴奋细胞膜静息电位的形成中十分重要，而平滑肌，心肌还有骨骼肌的收缩都需要可兴奋细胞膜的参与。