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.
Knowledge center. The yips refer to a very real physical condition called focal dystonia. Dystonia is a neurologic disorder characterized by involuntary movements or spasms of small muscles.In focal hand dystonia, the fingers either curl into the palm or extend outward without control.ystonia is a neurologic disorder characterized by involuntary movements or spasms of small muscles. In focal hand dystonia, the fingers either curl into the palm or extend outward without control.