Want to know:
Melatonin controls circadian rhythms. Circadian rhythms are in built 24-hour (day-night) cycles of activity. The hypothalamus controls the secretion of melatonin. Melatonin is secreted by the pineal gland (located in the brain). Melatonin levels are high at night, promoting sleep. Melatonin levels are low during the day. If volunteers are placed in continuous dark conditions, the circadian rhythm continues but will extend a little over 24 hours. Light signals that are transmitted to the hypothalamus, allow it to modify the timing of melatonin secretion each day.
Get a detailed, AI-powered explanation for this question and thousands more on StudyFetch.
Get the Answer for FreeHow StudyFetch Helps You Master This Topic
AI-Powered Answers
Get instant, detailed explanations powered by AI that understands your course material.
Deep Understanding
Go beyond surface-level answers with step-by-step breakdowns and examples.
Personalized Learning
Spark.E adapts to your learning style and helps you connect ideas.
Practice & Test
Turn any question into flashcards, quizzes, and practice tests to solidify your knowledge.
Explore More Questions
- A nurse is caring for a school age child who has a major burn and is experiencing severe pain. Which of the following actions should the nurse implement to manage the client's pain?A. Administer morphine sulfate IV via continuous infusionB. Administer meperidine IV around the clock as neededC. Administer acetaminophen PO every 4 hrD. Administer hydrocodone PO every 6 hr
- 260) Le cœur produit la FNA qui joue un rôle dans la production d'aldostérone
- Kidney DysfunctionA. Unmetabolized drug in circulation --> kidney get damaged while trying to excretion unmetabolized drugB. Decreased filtration of the drug from the bloodstream --> toxic levels of the drug in the bodyC. Congested blood vessels and slower circulation = kidneys retain water = less drug excreted, decreased distribution and effectiveness of the drug