Table of contents

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1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

16. The Endocrine System

Introduction to the Endocrine System

Anatomy & Physiology

16. The Endocrine System

Introduction to the Endocrine System

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Multiple Choice

Which of these hormones influences the sleep-wake cycle?

Adrenaline

Thyroxine

Melatonin

Insulin

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Verified step by step guidance

Identify the function of each hormone listed in the problem. Adrenaline is involved in the body's fight-or-flight response, thyroxine regulates metabolism, and insulin controls blood glucose levels.

Understand the role of melatonin in the body. Melatonin is a hormone produced by the pineal gland in the brain, primarily responsible for regulating sleep-wake cycles.

Recognize that melatonin levels typically rise in the evening, promoting sleep, and decrease in the morning, helping to wake the body up.

Consider the context of the sleep-wake cycle, which is a circadian rhythm influenced by light exposure and melatonin production.

Conclude that among the hormones listed, melatonin is the one that directly influences the sleep-wake cycle, as it helps regulate the timing of sleep and wakefulness.