Usually, an unrecognized cancer will have other symptoms or abnormalities of laboratory tests, in addition to unexplained weight loss. Potential causes of unexplained weight loss include: 1  Addison's disease (adrenal insufficiency). 2  Cancer. 3  Celiac disease.
Skeletal muscles are under voluntary control; smooth muscles and cardiac muscles aren't. 6 people found this useful. Edit. Share to: 1  The Five Major Parts of the Brain At its most basic, the brain controls the body. 2  Electrical impulses are sent along the nervous system to and from the brain that regulate all movement.hare to: 1  The Five Major Parts of the Brain At its most basic, the brain controls the body. 2  Electrical impulses are sent along the nervous system to and from the brain that regulate all movement.
Somatic Nervous System. Somatic nervous system (SONS) is also known as the Voluntary nervous system. The SONS is capable of managing the movements of the skeletal muscles voluntarily. There are efferent nerves present in the SONS to stimulate muscle contractions. All the voluntary movements in the skeletal muscles are controlled by the SONS.