What are reflex actions? Give two examples. Explain a reflex arc

Explanation

The sudden involuntary movement in a voluntary organ, in response to a stimulus, is called reflex action.
Examples of reflex action :
(a) Moving your hand away from a hot iron plate
(b) Blinking of eyes Reflex arc is a path of electrical impulse during a reflex action. It is composed of sensory neuron, spinal cord, motor neuron and muscle.
Steps of reflex are :
The sensory neuron picks signals from the stimulus and carries the signals to the spinal cord.
Spinal cord process the signals and sends a message through the motor neuron.
Motor neuron transmits the signals to the effector muscle so that the muscle can take immediate action.