When a muscle contracts, what happens?
Calcium combines with ATP to produce sarcomeres.
Actin produces myosin and ATP.
Myosin heads attach to and pull on a series of actin-binding sites.
Calcium produces contractions.

Question

When a muscle contracts, what happens? 
       Calcium combines with ATP to produce sarcomeres. 
       Actin produces myosin and ATP.
       Myosin heads attach to and pull on a series of actin-binding sites.
       Calcium produces contractions.

awolflover1 · Answer

Myosin heads attach to and pull on a series of actin-binding sites.

anonymous · Answer

How, I don't think so...

awolflover1 · Answer

-_- what do you think ?

anonymous · Answer

When muscle  contracts, it generates a force at the origin and insertion, causing the muscle to shorten and changing the angle of the joint.