● Thare are experiences of a sudden withdrawal of a body part which comes in contact with objects that are extremely `color{violet}("hot, cold pointed or animals")` that are scary or poisonous.

● The entire process of response to a peripheral `color{violet}("nervous stimulation,")` that occurs involuntarily, i.e., without
conscious effort or thought and requires the involvment of a part of the
central nervous system is called a `color{brown}("reflex action.")`

● The `color{violet}("reflex pathway ")` comprises at least one afferent `color{violet}("neuron (receptor)")` and one efferent (effector or excitor) `color{violet}("neuron appropriately")` arranged in a series.

● The afferent `color{violet}("neuron receives signal")` from a `color{violet}("sensory organ")` and `color{violet}("transmits the impulse")` via a `color{violet}("dorsal nerve root")` into the CNS (at the level of `color{violet}("spinal cord")` ).

● The `color{violet}("efferent nueuron")` then carries signals from CNS to the `color{violet}("effector.")`

● The stimulus and response thus forms a `color{brown}("reflex arc")` as shown below in the `color{brown}("knee jerk reflex.")`

● `color{brown}("Questions to consider regarding")` `color{brown}("our sensory perceptions:")`

`color{green}(" ★ How does one feel the"`) `color{green}("climatic changes in the environment?")`

`color{green}(" ★ How does one see an")` `color{green}("object and its colour?")`

`color{green}(" ★ How does one hear a sound?")`

● The `color{brown}("sensory organs")` detect all types of changes in the `color{violet}("environment")` and send `color{violet}("appropriate signals")` to the CNS, where all the inputs are processed and `color{violet}("analysed.")`

● `color{violet}("Signals")` are then sent to `color{violet}("different parts/ centres")` of the `color{violet}("brain.")`

● This is how you can `color{brown}("sense changes")` in the `color{violet}("environment.")`

● To `color{violet}("understand sensory perceptions")` , one needs to be introduced to the structure and functioning of the `color{brown}("eye")` (sensory organ for `color{brown}("vision")`) and the `color{brown}("ear")` (sensory organ for `color{brown}("hearing")`).