natremia The presence of sodium ions in the blood. Derived terms . dysnatremia; hypernatremia; hyponatremia; natremic; Translations
A reflex arc is a nerve pathway in the body of humans and some animals that connects certain muscle groups to others, without involving the brain. These sorts of pathways primarily control involuntary movements in response to some sort of stimulus.
The Reflex arc is the main functional unit of the nervous system that helps a person react to a stimulus. Functions of different parts of the nervous system. Different parts of the nervous system have different functions. They can be outlined as follows. Functions of the brain. The brain is made up of several parts. Each part has a certain function: Cerebral Cortex . Thought , voluntary movement , language, reasoning and perception are the major functions of the cerebral cortex.