Which of the following is an emergency hormone

The hormone responsible for the sodium metabolism is

Norepinephrine

$(i)$ is released by sympathetic fibers

$(ii)$ is released by parasympathetic fibers

$(iii)$ increases the heart rate

$(iv)$ decreases blood pressure.

Which of the above statements are correct ?

Injury to adrenal cortex is not likely to affect the secretion of which one of the following?

$I.$ Increased alertness    $II.$ Pupillary dilation    $III.$ Raising of hairs    $IV.$ Sweating

All of the above written physiological processes are regulated by