Mammoth Memory

Reflex action – near-instantaneous response that does not involve the brain 

A reflex action is a very fast response to a stimulus that does not involve the brain; having to think would slow down the response.

The reflex action is very fast and does not involve the brain directly but a message is sent to the brain

The reflection (reflex action) in the mirror did not involve the brain.

Diagram shows that stimulation like heat and cold don’t involve the brain at it would take to long to send a response  

In a reflex action, a stimulus (in this case, the heat from a burning candle) arouses sensory receptors, which send a signal via sensory neurones to the spinal cord. The signal is then transferred to a relay neuron, which in turn passes the signal to a motor neurone. Upon receiving the signal from the motor neurone, the effector muscle in the arm responds by contracting to move the hand from the flame. It takes a fraction of a second, and the reflex action signal does NOT go to the brain, which would slow down the action.

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