The process of response to a peripheral nervous stimulation,that occurs involuntarily is called

If the light source in front of an eye becomes bright suddenly,what happens?

$A$ simple two-neuron reflex arc involves:

Give a scientific reason: Reflex action plays a significant role in animals.

Given below are different components of a reflex arc:
$I$. Effector organ
$II$. Interneuron
$III$. Motor neuron
$IV$. Sensory neuron
$V$. Sensory receptor
Arrange these in the correct order of the action potential that follows a sensory receptor stimulation.

Reflex action is controlled by