Question

The stimulus interval has a profound effect on the contractionforce of the muscle. In your own words explain what happened whenthe muscle was stimulated in rapid succession. What was the minimumtime required for the subject's muscle twitches to add together(summation)?

You use a short period electrical stimuli to observe musclefibers contracting continuously (tetanus). Chemical
agents can cause tetanus by interfering with the motor neurons.These agents include a toxin produced by
the soil bacterium Clostridium tetani. One of the symptoms of theseagents is called 'spastic paralysis'! Explain
in your own words why these agents would be a bad thing for you andyour muscles.