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.
Reflex arc. A reflex arc is the neural pathway that mediates a reflex action. In higher animals, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.This characteristic allows reflex actions to occur relatively quickly by activating spinal... reflex arc n. Physiology.n a simple reflex arc, such as the knee jerk, a stimulus is detected by a ... A reflex arc is the neural pathway that mediates a reflex action. ... When a reflex arc consists of only two neurons (one sensory neuron and one motor ...