What effect can electric shock have on muscles?

Electric shock can have a significant effect on muscles, particularly by causing spasms. When the body experiences electric shock, the electrical current can disrupt the normal electrical signals that control muscle contractions. This disruption can lead to uncontrolled and sudden muscle contraction, or spasms, as the muscles respond to the electrical stimuli in an abnormal manner.

The nature of electric shock often triggers a fight-or-flight response in the body, which can further exacerbate muscle tension and spasm. Muscle spasms resulting from electric shock can vary in severity and duration, depending on the intensity of the current and the duration of exposure.

The other options suggest effects that do not accurately reflect what occurs during an electric shock. Relaxation of the muscles typically occurs after a muscle has been contracted, but in the case of electric shock, the dominant response is contraction itself. Increased flexibility and enhanced strength are also not physiological responses to electric shock, as these effects would not result from disruption of the normal functioning of muscles.