Table of contents

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 gland secretes melatonin?

Pituitary gland

Thyroid gland

Adrenal gland

Pineal gland

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Verified step by step guidance

Begin by identifying the function of melatonin. Melatonin is a hormone that regulates sleep-wake cycles and is involved in the body's circadian rhythms.

Next, consider the location and function of the pineal gland. The pineal gland is a small endocrine gland located in the brain, specifically near the center between the two hemispheres.

Understand the role of the pineal gland in hormone secretion. The pineal gland is responsible for producing and secreting melatonin, especially in response to darkness, which helps regulate sleep patterns.

Compare the functions of other glands listed in the options: The pituitary gland, thyroid gland, and adrenal gland have different roles, such as regulating growth, metabolism, and stress response, respectively, but do not secrete melatonin.

Conclude that the pineal gland is the correct answer, as it is the gland specifically responsible for the secretion of melatonin.