Answer to Question 1
A contraction is the normal shortening of a muscle fiber as actin filaments slide between myosin filaments in response to an electrical impulse from a nerve. A contracture is an abnormal, fixed position of a muscle in which it shortens due to inactivity or paralysis and becomes immobile.
Answer to Question 2
Many medical words are derived from ancient Latin and Greek words. Sometimes the words are very similar to the original Latin and Greek words. Some medical words are also derived from other languages, such as English, Dutch, and French.
Premature ventricular contraction.
Cervical cancer (a) Top view of the uterus showing the presence of a tumor in the wall of the cervix
Regulation of muscle contraction by tropomyosin and troponin
A model of the ATP cycle in muscle contraction
Role of calcium in muscle contraction