An increase in the level of serotonin levels in the human body is known to significantly enhance the mood of the person and in some cases, help people overcome depression. Serotonin taken orally does not pass into the pathways of the central nervous system, because it does not cross the blood-brain barrier. However, tryptophan and its metabolite 5-hydroxytryptophan (5- HTP), from which serotonin is synthesized, does cross the blood-brain barrier. These agents are available as dietary supplements, and may be effective serotonergic agents.Which of the following can be correctly inferred from the statements above?
Correct answer: D. Tryptophan is an effective agent that can help cure depression in some cases
- A. Individuals who do not consume enough tryptophan can develop depressive tendencies
- B. Individuals who consume tryptophan can metabolize enough serotonin and do not run the risk of depression
- C. Consumption of serotonin-laced foods can help cure depression in some cases
- D. Tryptophan is an effective agent that can help cure depression in some cases
Explanation
The passage notes that tryptophan and its metabolite 5-HTP can cross the blood-brain barrier and are considered effective serotonergic agents, which suggests they may help with mood enhancement and potentially alleviate depression in some cases.
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