The $PNS$ (Peripheral Nervous System) comprises:

Neural crest cells break off from the . . . . . . and later move to the sides of the developing embryo to form . . . . . . .

$P$ - The nervous system that relays impulses from the $CNS$ to skeletal muscles.
$Q$ - The nervous system that transmits impulses from the $CNS$ to involuntary organs and smooth muscles of the body.
$\quad\quad\quad P \quad\quad Q$

Select the incorrect option for the Autonomic Neural System $(ANS)$.

Parasympathetic nerves increase the mobility in

Differentiate between the invertebrate neural system and the vertebrate neural system.