The amino acid tryptophan is the precursor for the synthesis of:
Correct answer: C. Melatonin and serotonin
- A. Estrogen and progesterone
- B. Cortisol and cortisone
- C. Melatonin and serotonin
- D. Thyroxine and triiodothyronine
Explanation
Tryptophan is an essential amino acid which is the precursor for the synthesis of melatonin and serotonin.
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Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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