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

(N/A) Reflex actions are rapid,automatic,and involuntary responses to a stimulus that do not involve conscious thought by the brain.
Examples:
$1$. Sudden withdrawal of the hand upon touching a hot object.
$2$. Blinking of eyes when a bright light or object suddenly approaches them.
Reflex Arc:
$A$ reflex arc is the neural pathway that mediates a reflex action. The pathway consists of the following components:
$1$. Receptor: Detects the stimulus.
$2$. Sensory Neuron: Carries the signal from the receptor to the spinal cord.
$3$. Relay Neuron (Interneuron): Processes the signal within the spinal cord.
$4$. Motor Neuron: Carries the response signal from the spinal cord to the effector.
$5$. Effector: $A$ muscle or gland that performs the action.