4.4 Muscle action around a joint Flashcards
1
Q
What is the muscle that contracts?
A
Agonist
2
Q
What is the muscle that is relaxing or lengthening?
A
Antagonistic
3
Q
What does muscle contraction require?
A
It requires energy, and is powered by ATP within the muscle cells.
4
Q
How do antagonistic pairs work?
A
One muscle of the pair contracts to move the body part, the other muscle in the pair then contracts to return the body part back to the original position.
