Chemical compounds containing nitrogen that are derived from the amino acid tyrosine are known as:

A) adrenalines
B) alpha-adrenergic receptors
C) catecholamines
D) thymosines

C) catecholamines
Norepinephrine and epinephrine are catecholamines (chemical compounds containing nitrogen that are derived from the amino acid tyrosine), which bind to adrenergic receptors and produce sympathetic effects.