The involuntary muscle action of the alimentary canal is called peristalsis. It uses this muscle action to move food through.
Reaction. What that would be determined by the action.
antagonist muscle
THe action of the digastric muscle is to depress the mandible or evaluate the larynx
The frowning action.
Action potential duration in skeletal muscle is around 2 - 5 milliseconds.
gdg
It represents contracting or shortening of a muscle.
rectus femoris
brachioradialis
Reflex action
infraspinatus muscle