Muscle Twitch, Wave Summation & Muscle Tension


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Marcy is using an electrical muscle stimulator for fifteen minutes, twice a day, in an effort to rebuild muscle strength in her leg following knee surgery. Once Marcy attaches the electrodes, the muscle in her leg is contracted for ten seconds, followed by twenty seconds of rest. The time where her muscle is NOT being contracted is known as the _____.

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1. Tetanic contraction is produced when repeated stimuli is administered during which part of the muscle twitch?

2. An isolated muscle is stimulated with increasing stimulus strength. Stimuli of 10, 15 and 20 mV produced no response, while 25 mV produced a small contraction. Which of the following is the threshold stimulation?

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About This Quiz & Worksheet

On this quiz, some questions will ask you to identify the parts and characteristics of muscle twitches. The quiz will also present you with scenarios related to muscle contractions that you'll need to interpret.

Quiz & Worksheet Goals

The quiz tests you on the following:

  • The contraction used for posture
  • Finding the threshold stimulation in a sample problem
  • The part of a twitch that removes the slack from the muscle
  • When repeated stimuli are needed to create tetanic contraction
  • Term for a staircase-like contraction

Skills Practiced

The quiz helps you practice the following skills:

  • Reading comprehension - ensure that you draw the most important information from the related muscle twitch lesson
  • Making connections - use understanding of the concept of muscle contractions to recognize how posture is maintained
  • Critical thinking - apply relevant concepts to examine information about the muscles of the body in a different light

Additional Learning

The partner lesson titled Muscle Twitch, Wave Summation & Muscle Tension will fill you in on more details related to how our muscles work. You'll explore the following learning objectives:

  • Define what a muscle twitch is
  • Know what a force transducer is and how it's used in muscle experiments
  • Explore the concept of twitch summation