Macromolecules play vital roles within your body. Macromolecules are large molecules within your body that serve essential physiological functions. Encompassing carbohydrates, proteins, lipids and nucleic acids, macromolecules exhibit a number of similarities.
Cerebellum. The cerebellum (infratentorial or back of brain) is located at the back of the head. Its function is to coordinate voluntary muscle movements and to maintain posture, balance, and equilibrium.
  The cerebellum coordinates movement because it controls muscle coordination and balance. It is located in the lower back of the brain above the pons. The cerebellum send â¦ s the instructions/messages to the cerebral motor cortex that causes your muscles to move.