S & M Systems: Muscle Contractions Flashcards
1
Q
Muscles use e______ to create a force. The force is created by muscles c_________. Contractions are classified as i__________ or i_________.
A
Energy
Contractions
Isotonic
Isometric
2
Q
What is ISOTONIC contraction?
A
Muscles CHANGE LENGTH during its contraction
The joint WILL MOVE
3
Q
What is ISOMETRIC contraction?
A
Muscles contract but there’s NO CHANGE IN LENGTH
Joint will stay IN THE SAME POSITION
4
Q
What is CONCENTRIC contraction?
A
When the muscle SHORTENS PRODUCING TENSION
The force PULLS TWO BONES TOGETHER
It CAUSES joint movement
5
Q
What is ECCENTRIC contraction?
A
When the muscle LENGTHENS PRODUCING TENSION
This resists forces like GRAVITY or a WEIGHT
It CONTROLS joint movement
