Illustration of the cells involved in a reflex arc. A reflex arc is an involuntary response to a stimulus (such as pain) that allows a quick action by by-passing the conscious brain. A sensory neuron (nerve cell, left) detects the stimulus and passes a signal to an interneuron (centre). The interneuron passes the signal to a motor neuron (right), which effects a response. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Leroy, Francis / Biocosmos |
Taille de l’image : | 4054 px × 2587 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |