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.
Mainly reflexes are there to prevent â¦ injuries because it's much faster than a voluntary response (actions/response you control). A reflex arc is basically: A stimulus is detected by the receptors in a sense organ.he signal goes up the sensory nerve to the spinal cord and then down a motor nerve to produce the motion. All of the processing of the signal is done in the spinal cord. An autonomic reflex involves different centers in the brain and does not always trigger motion.