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.
what is the difference in reflex arc between the somatic and autonomic nervous system? somatic: single neuron (efferent neuron from spinal cord - effector) autonomic: 2 neurons (efferent neuron to ganglion - synapse - post ganglionic neuron - effector