Question 6 options:
Use the following word choice to complete the blanks. Note that some will be used more than once or not at all.
concentric maximum summation
eccentric partial all
isometric fused tetanus a majority
isotonic unfused tetanus a few
When a muscle fiber is stimulated, within that muscle fiber
of its myofibrils undergo the contraction cycle.
Tetanus results from the
of individual twitches.
This type of tetanus,
, is not used when we actually use our muscles, but can only be revealed in experimental settings.
A single motor unit that is activated to tetanus reaches its
force.
When we activate multiple motor units their individual forces combine to produce a greater force for the overall muscle through
of force.
When an entire muscle (not just a motor unit) contracts to maximum force,
(how many?) of its motor units are recruited.
Muscle contraction that leads to shortening of the muscle is also called
contraction. But sometimes a muscle might lengthen during contraction and that is
contraction. Neither of those types of contractions, when muscle length changes, can be a/an
contraction.
When a contraction occurs while lifting a steady amount of weight, it is considered a/an
contraction.