Answers please?

Which of the following produced an increase in stimulus intensity?
   clicking the mouse in rapid succession and allowing the muscle to completely relax in between contractions
   increasing the voltage applied
   clicking the mouse in rapid succession
   allowing the muscle to completely relax in between contractions


Which of the following produced an increase in stimulus frequency?
   allowing the muscle to completely relax between contractions
   clicking the mouse in rapid succession
   clicking the mouse in rapid succession and allowing the muscle to completely relax in between contractions
   increasing the voltage applied

Which of the following does NOT describe treppe?
   An incremental increase in force occurs.
   It is also referred to as the “staircase” effect.
   A period of relaxation can be seen on the muscle twitch tracing.
   An increase in stimulus intensity is required to see the effect

Which of the following describes the relationship between length and tension?
   As the muscle's resting length increases, the active force will decrease.
   As the muscle's resting length increases, the active force will increase.
   As the muscle's resting length decreases, the active force will decrease.
   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?
   The amount of available calcium varies.
   The amount of available ATP varies.
   The amount of resistance varies.
   The number of cross-bridges between actin and myosin varies.

Which starting length of the muscle provided the maximum total force?
   an intermediate starting length
   the shortest starting length
   the longest starting length
   The length of the muscle did not affect the amount of total force produced.

At which muscle length was the passive force the greatest?
   80 mm
   100 mm
   90 mm
   70 mm

In this activity, why did the muscle force decrease over time?
   Intracellular calcium built up.
   The stimulation frequency was increased.
   Muscle fatigue developed.
   The stimulation frequency was decreased.

Which of the following describes how increasing the duration of the rest period affected muscle tension?
   Increasing the duration of the rest period had no effect on the subsequent maximal tension.
   Increasing the duration of the rest period decreased the duration of subsequent maximal tension.
   Increasing the duration of the rest period decreased the amount of the subsequent maximal tension.
   Increasing the duration of the rest period increased the duration of the subsequent maximal tension.

What might be occurring on a molecular level during the rest periods?
   Intracellular ADP and inorganic phosphate are decreasing.
   Muscle fatigue is increasing.
   Intracellular calcium is decreasing.
   Intracellular lactic acid is increasing.