Take This Quiz To Learn About Secretion & Action of Melatonin
The human body is a marvelous creation. Melatonin is a hormone secreted by the brain that has many crucial functions. We encourage you to take this Quiz to Learn about the secretion & action of melatonin. Wouldn't it be super fun? This awesome quiz is carefully curated by experts to help you gain
comprehensive knowledge of the concept; Therefore we suggest that you answer all the questions very carefully. Please remember that the quiz has no time bar, so feel free to attempt it as often as you like. Let's enhance your knowledge with a fun quiz! Good Luck!
- 1.
Melatonin is what type of substance?
- A.
Neuropeptide
- B.
Nitrogen species
- C.
Oxidative reactive species
- D.
None of the above
Correct Answer
A. NeuropeptideExplanation
Melatonin is classified as a neuropeptide because it is a hormone produced by the pineal gland in the brain. Neuropeptides are small protein-like molecules that function as neurotransmitters or neuromodulators in the nervous system. Melatonin plays a crucial role in regulating the sleep-wake cycle and is involved in various physiological processes, such as circadian rhythm regulation and immune function. Therefore, it falls under the category of neuropeptides rather than nitrogen species, oxidative reactive species, or none of the above.Rate this question:
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- 2.
Which of the following is the function of Melatonin?
- A.
Sleep / Circadian rhythm regulation
- B.
Antioxidant protection
- C.
Immunity
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
Melatonin is a hormone produced by the pineal gland that helps regulate sleep and the body's internal clock, known as the circadian rhythm. It plays a crucial role in promoting healthy sleep patterns and maintaining a balanced sleep-wake cycle. Additionally, melatonin acts as an antioxidant, protecting cells from oxidative damage caused by harmful free radicals. It has been found to have immune-enhancing properties, supporting the body's defense mechanisms against infections and diseases. Therefore, "All of the above" is the correct answer as melatonin functions in sleep regulation, antioxidant protection, and immunity.Rate this question:
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- 3.
Melatonin is produced in what part of the body?
- A.
The right atrium
- B.
Pineal gland
- C.
Kidneys
- D.
Liver
Correct Answer
B. Pineal glandExplanation
Melatonin is a hormone that regulates sleep-wake cycles. It is primarily produced in the pineal gland, a small gland located in the brain. The pineal gland receives signals from the retina in response to changes in light and darkness, and then releases melatonin to promote sleepiness at night. This hormone helps to regulate the body's internal clock and promote healthy sleep patterns.Rate this question:
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- 4.
From which substance is melatonin metabolized?
- A.
Histamine
- B.
Norepinephrine
- C.
Dopamine
- D.
L-tryptophan
Correct Answer
D. L-tryptopHanExplanation
Melatonin is a hormone that regulates sleep-wake cycles. It is synthesized from the amino acid L-tryptophan. L-tryptophan is converted into 5-hydroxytryptophan (5-HTP) by the enzyme tryptophan hydroxylase. 5-HTP is then further converted into serotonin, which is finally converted into melatonin by the enzyme serotonin N-acetyltransferase. Therefore, L-tryptophan is the substance from which melatonin is metabolized.Rate this question:
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- 5.
What is the metabolic half-life of melatonin?
- A.
5 days
- B.
20 to 50 minutes
- C.
2 hours
- D.
3 minutes
Correct Answer
B. 20 to 50 minutesExplanation
The metabolic half-life of melatonin is 20 to 50 minutes. This means that it takes approximately 20 to 50 minutes for half of the melatonin in the body to be metabolized and eliminated.Rate this question:
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- 6.
The secretion of melatonin is affected by what?
- A.
Weight loss
- B.
Sweating
- C.
Darkness
- D.
Physical injury
Correct Answer
C. DarknessExplanation
Melatonin is a hormone that regulates sleep and wakefulness. It is primarily secreted by the pineal gland in response to darkness. When it gets dark, the pineal gland is stimulated to release melatonin, which helps to induce sleep. On the other hand, exposure to light inhibits the secretion of melatonin, promoting wakefulness. Therefore, darkness directly affects the secretion of melatonin.Rate this question:
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- 7.
Which substance stimulates the secretion of melatonin?
- A.
Epinephrine
- B.
Proteins
- C.
Histamine
- D.
Norepinephrine
Correct Answer
A. EpinepHrineExplanation
Epinephrine stimulates the secretion of melatonin. Melatonin is a hormone that regulates sleep-wake cycles, and epinephrine, also known as adrenaline, is involved in the body's stress response. Epinephrine activates the sympathetic nervous system, which in turn stimulates the pineal gland to release melatonin. This hormone helps to regulate the body's internal clock and promote sleep.Rate this question:
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- 8.
Which of the following is among the side effects of melatonin supplementation?
- A.
Drowsiness
- B.
Headaches
- C.
Dizziness
- D.
All of the above
Correct Answer
A. DrowsinessExplanation
Melatonin supplementation can cause drowsiness as a side effect. Melatonin is a hormone that regulates sleep-wake cycles, and taking it as a supplement can cause drowsiness and make a person feel sleepy. This is why melatonin is often used as a sleep aid for individuals who have trouble falling asleep or have insomnia.Rate this question:
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- 9.
Melatonin is used as a treatment measure of which of the following disorders?
- A.
Insomnia
- B.
Diabetes
- C.
Lupus
- D.
Cancer
Correct Answer
A. InsomniaExplanation
Melatonin is a hormone that is naturally produced by the body to regulate sleep-wake cycles. It helps to control the internal body clock and promote sleep. Insomnia is a sleep disorder characterized by difficulty falling asleep or staying asleep. By taking melatonin as a treatment measure, it can help regulate the sleep-wake cycle and improve sleep quality in individuals with insomnia. Therefore, melatonin is used as a treatment measure for insomnia.Rate this question:
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- 10.
At what time of the day is the melatonin production the weakest?
- A.
Night
- B.
Day
- C.
Morning
- D.
None of the above, the melatonin production remains the same through the day
Correct Answer
B. DayExplanation
Melatonin is a hormone that regulates the sleep-wake cycle. It is produced by the pineal gland in the brain. The production of melatonin is highest during the night and lowest during the day. This is because melatonin production is stimulated by darkness and inhibited by light. During the day, when there is more exposure to light, the production of melatonin is suppressed, leading to lower levels of the hormone. Therefore, the correct answer is "Day."Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Aug 16, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 22, 2022Quiz Created by
Tanya Mishra
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