Exercise 2: Skeletal Muscle Physiology: Activity 3: The Effect of Stimulus Frequency on Skeletal Muscle Contraction Lab
Pre-lab Quiz Results
You scored 75% by answering 3 out of 4 questions correctly.
twitch of a skeletal muscle
Your answer : c. no force is produced unless the muscle shortens.
Correct answer: b. maximal force is never achieved.
When a skeletal muscle is repetitively stimulated, twitches can overlap each other and result in a stronger muscle
contraction than a stand-alone twitch. This phenomenon is known as
You correctly answered: c. wave summation.
Wave summation is achieved by
You correctly answered: a. increasing the stimulus frequency (the rate of stimulus delivery to the muscle).
Wave summation increases the force produced in the muscle. Another way to increase the force produced by a muscle
You correctly answered: d. increase the number of activated motor units.
Predict Question 1:
As the stimulus frequency increases, what will happen to the muscle force generated with each
successive stimulus? Will there be a limit to this response?
Your answer : d. As the stimulus frequency increases, the muscle force generated by each successive stimulus will first
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