Question
Biology Question on Human Endocrine System
During emergency, which one of the following hormone is important?
A
aldosterone
B
adrenaline
C
thyroxine
D
calcitonin
Answer
adrenaline
Explanation
Solution
Adrenaline (epinephrine) is a hormone derived from an amino acid, tyrosine secreted by chromaffin cells of adrenal gland (medulla part) and to a lesser extent by sympathetic nerve endings. It is called the emergency hormone because it is secreted during the stress, excitement like conditions.