Myotonia is characterized by:
A) prolonged depolarization of muscle cell membranes.
B) absence of ATP for muscle contraction.
C) delayed muscle contraction.
D) hyperactive reflexes.

Question

Quizplus · Accepted Answer

Myotonia is a condition where there is a delay in muscle relaxation after contraction, resulting in prolonged muscle stiffness or tension. It is caused by a defect in muscle cell membrane ion channels, specifically the chloride channel or sodium channel, which leads to an inability to quickly repolarize the cell membrane after depolarization. This results in a prolonged depolarization of the muscle cell membrane, which leads to the characteristic myotonic stiffness.

Myotonia Is Characterized By