Cytoplasm. The cytoplasm is the part of the cell which does all the work. Different cells do different jobs, however whatever the job is it will require energy in the form of a chemical called ATP. This energy containing chemical is produced by tiny organelles in the cell called mitochondria. Muscle cells contain two very special chemicals called actin and myosin.
Definition of TREPHINATION. : an act or instance of perforating the skull with a surgical instrument. ADVERTISEMENT.efinition of TREPHINATION. : an act or instance of perforating the skull with a surgical instrument. ADVERTISEMENT.
CARDIOVERSION: Synchronization during cardioversion of ventricular tachycardia; an arrow above each QRS complex denotes the period in cardiac depolarization when a shock will be delivered to terminate the rhythm. The restoration of normal sinus rhythm by chemical or electrical means.pplication of the shock is synchronized to the QRS complex. Cardioversion is used to slow the heart or to restore the heart's normal sinus rhythm when drug therapy is ineffective at doing so.