Question

Smooth muscles depolarize as a result of a transmembrane current of ________. smooth muscles depolarize as a result of a transmembrane current of ________. potassium ions chloride ions sodium ions calcium ions

Answer 1

Smooth muscles depolarize as a result of a transmembrane current of Calcium ions.                                                                                                                       When an action potential depolarizes the muscle cell membrane, it also travels into the body of the cell via the t-tubules. Unlike skeletal muscle, smooth muscle is dependent in two sources of calcium in order to intiate contraction. These two sources are calcium sequestered in the S.R. of the smooth muscle cell.