Carbon contributes an electron, and Hydrogen contributes an electron. The sharing of a single electron pair is termed a single bond. When two pairs of electrons are shared, a double bond results, as in carbon dioxide.
Elements of nervous system involved in motor coordinationEdit. The red nucleus is mainly involved in motor coordination of the muscles of the shoulder and upper arm, but it has some control over the lower arm and hand as well.
1 Summary of the anatomy of structures involved in what could be called the motor system: nervous system, muscles, skeleton; 2  Normal motor control through simplified patterns of movement;  Potential motor impairments and the significant syndromes they can cause.