Multiple Choice Questions

As the stimulus voltage increased, the resulting muscle tension _______.
  • increasing the voltage applied
  • The muscle force generated increased.
  • increased to a point until it reached a plateau
  • Intracellular ADP and inorganic phosphate are decreasing.
At which muscle length was the passive force the greatest?
  • 100 mm
  • 146 stimuli/sec
  • clicking the mouse in rapid succession
  • Cross-bridge cycling is taking place.
Which of the following occurs during the latent period of muscle contraction?
  • Cross-bridge cycling is taking place.
  • clicking the mouse in rapid succession
  • release of acetylcholine or electrical stimulation
  • Calcium is released from the sarcoplasmic reticulum.
Which of the following occurs during the contraction phase?
  • clicking the mouse in rapid succession
  • Cross-bridge cycling is taking place.
  • increasing the voltage applied
  • increasing the stimulus frequency
Which of the following describes the relationship between stimulus frequency and muscle tension?
  • Increasing the duration of the rest period increased the duration of the subsequent maximal tension.
  • When stimulus frequency increases, muscle tension increases to a maximum value.
  • The sarcomeres are increasing in length, and the force generated decreases.
  • The active force can increase or decrease, depending on the starting resting length of the muscle.
Why does the active force of skeletal muscle change with the muscle's resting length?
  • Calcium is released from the sarcoplasmic reticulum.
  • The active force can increase or decrease, depending on the starting resting length of the muscle.
  • When stimulus frequency increases, muscle tension increases to a maximum value.
  • The number of cross-bridges between actin and myosin varies.
Which of the following would result in fused or unfused tetanus compared to a single muscle twitch?
  • increasing the stimulus frequency
  • increasing the voltage applied
  • clicking the mouse in rapid succession
  • Increasing the duration of the rest period increased the duration of the subsequent maximal tension.
Which starting length of the muscle provided the maximum total force?
  • increasing the voltage applied
  • Muscle fatigue developed.
  • the longest starting length
  • clicking the mouse in rapid succession
Which of the following describes how increasing the duration of the rest period affected muscle tension?
  • increasing the voltage applied
  • Increasing the duration of the rest period increased the duration of the subsequent maximal tension.
  • increasing the stimulus frequency
  • The active force can increase or decrease, depending on the starting resting length of the muscle.
What might be occurring on a molecular level during the rest periods?
  • Intracellular ADP and inorganic phosphate are decreasing.
  • release of acetylcholine or electrical stimulation
  • increasing the voltage applied
  • increased to a point until it reached a plateau
At what stimulus frequency was maximal tetanic tension developed?
  • Muscle fatigue developed.
  • stimulus frequency increased
  • The muscle force generated increased.
  • 146 stimuli/sec
Which of the following can trigger a muscle twitch?
  • release of acetylcholine or electrical stimulation
  • An increase in stimulus intensity is required to see the effect.
  • The sarcomeres are increasing in length, and the force generated decreases.
  • Calcium is released from the sarcoplasmic reticulum.
Increasing the applied voltage in the simulation corresponds to which in vivo event?
  • motor unit recruitment
  • Muscle fatigue developed.
  • stimulus frequency increased
  • the longest starting length
As the stimulus voltage was increased in this activity, which of the following occurred?
  • The muscle force generated increased.
  • The active force can increase or decrease, depending on the starting resting length of the muscle.
  • increased to a point until it reached a plateau
  • The number of cross-bridges between actin and myosin varies.
Which of the following does NOT describe treppe?
  • An increase in stimulus intensity is required to see the effect.
  • The sarcomeres are increasing in length, and the force generated decreases.
  • increasing the voltage applied
  • release of acetylcholine or electrical stimulation
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Multiple Choice Questions
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