An involuntary muscle contraction is called a spasm.
This is due to contraction of the biceps, and is known as flexion.
contracture
The continuous partial contraction of muscle is called muscle tone
Muscles provide movement, especially the skeletal muscles. The smooth muscles in our organs produce movement called peristalsis or tonic contraction which holds sphincters closed.
I believe that is called diastole, in contrast to systole, the contraction of the heart muscles.
if you're on OdysseyWare your answer would be Active stretching.............. =)
This process is called contraction. Muscles shorten or contract to produce movement.
The sinoatrial node is the small group of cardiac muscles that initiates each heart contraction.
There are different models that describe the contraction of muscles. Not everyone agrees on which is best. A couple of the models are the sliding-filament model and Huxley's model.
An isometric contraction is the name given to a skeletal muscle that does not shorten, but increases tension. The muscles generate force to protect themselves.
All muscles cause movement due to the contraction of coupled muscle cells. Perhaps the question intended to inquire about muscles that cause a bending in which the joint angle decreases. Muscles of this type are called flexor muscles (biceps for example).
Repeating units of actin and myosin filaments are called sarcomeres. These are designed to control the contraction of muscles in the human body.