Nerve impulse is:

In humans,the visceral organs are innervated by:

$P$ - Contains unmyelinated nerve fibers.
$Q$ - Contains myelinated nerve fibers.
$I$ - Spinal nerves
$II$ - Autonomic neural system
$III$ - Somatic nerve fibers
$IV$ - Cranial nerves
Select the correct option for $P$ and $Q$.
$\quad\quad P$ $\quad$ $\quad$ $Q$

The autonomic neural system is a division of

The sympathetic and parasympathetic neural system combines from

The somatic neural system relays impulses: