Which of the following hormones is released in excess quantity during excitement?

$A$ person entering an empty room suddenly finds a snake right in front on the right side. Which one of the following is likely to happen in his neuroendocrine system?

Tyrosine is the precursor of

What is the embryonic origin of the adrenal gland?

The heart beat increases at the time of interview due to

$A$ : Our body secretes adrenaline in intense cold.
$R$ : Adrenaline raises metabolic rate.