In most cells, the action potential starts with the resting potential, which the cell maintains by pumping sodium ions out and potassium ions in, Right?

在大多数细胞中，动作电位是从静息电位开始的，静息电位是细胞通过泵送钠离子和泵送钾离子来维持的，对吗？

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。

As potassium levels INcrease in the EXTRAcellular space, the MAGNITUDE of potassium gradient across the cell membrane is REDUCED, and so is the ABSOLUTE value of the resting membrane potential.

随着细胞外钾离子浓度增加，跨细胞膜上钾离子梯度减小，静息膜电位的绝对值也减小。