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


Best Answer

Answer: 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.
 
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 arc
 
• 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.

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