Which hormone is derived from tryptophan and helps regulate circadian rhythm?
A
Epinephrine.
B
Thyroxine.
C
Melatonin.
D
Growth hormone.
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1
Identify the key function of the hormone in question, which is to regulate circadian rhythm.
Understand that circadian rhythm is the body's internal clock that regulates the sleep-wake cycle.
Recognize that melatonin is a hormone known for its role in regulating sleep patterns and circadian rhythms.
Recall that melatonin is synthesized from the amino acid tryptophan, which is a precursor in its biosynthesis pathway.
Differentiate melatonin from other hormones listed, such as epinephrine, thyroxine, and growth hormone, which have different functions and biosynthetic origins.