Which of the following cranial nerves are classified as mixed nerves?

Injury to the $Vagus$ nerve ($CN$ $X$) in humans is not likely to affect which of the following?

Neurosis is characterised by

Glucose and oxygen are required by the brain for a constant supply of energy to control the functions of our body organs. What will be the consequences if the brain is deprived of oxygen and glucose?
$I.$ Brain deprived of oxygen for just $5$ minutes will get permanently damaged.
$II.$ Glucose is important in the nerve impulse conduction.
$III.$ One side of the brain is unable to know what the other side is doing when it is deprived of oxygen.
$IV.$ Mental confusion will result if the brain is deprived of glucose.

$I.$ The endocrine system provides chemical integration through hormones.
$II.$ The neural system provides an organized network of point-to-point connections for quick coordination.
$III.$ The neural organization is very complex in lower invertebrates.
$IV.$ The human neural system includes $CNS$ and $PNS$.
Select the correct statements.

The $Facial$ nerve is: