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

1.	What are reflex actions? Give two examples. Explain a reflex arc
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 message through the motor neuron. Motor neuron transmits the signals to the effector muscle so that the muscle can take immediate action.

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 message through the motor neuron.
Motor neuron transmits the signals to the effector muscle so that the muscle can take immediate action.

Discussion