Why have reflex arcs evolved in animals? - Science | Shaalaa.com

This video is a good demonstration for a reflex arc. A reflex arc is a neural pathway that controls 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 motor neurons without the delay of routing signals through the brain, although the brain will receive sensory input while the reflex is carried out. | EM-SportScience

How to Use a Photography Reflector for Perfect Lighting

A Photographer's Guide to Light: Noticing Direct Reflections | Envato Tuts

Using Reflected Light and Negative Fill to Your Advantage in Photography