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

What is the primary action of the thyroid hormone thyroxine on the skeletal system?

Stimulates bone resorption and increases calcium release

Inhibits osteoblast activity

Promotes bone growth and development

Decreases bone density

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Verified step by step guidance

Understand the role of thyroxine: Thyroxine, also known as T4, is a hormone produced by the thyroid gland. It plays a crucial role in regulating metabolism and has significant effects on growth and development, including the skeletal system.

Identify the effects of thyroxine on bone cells: Thyroxine influences both osteoblasts (cells that form new bone) and osteoclasts (cells that break down bone). It generally promotes the activity of osteoblasts, leading to bone formation.

Consider the impact on bone growth: Thyroxine is essential for normal bone growth and development, especially during childhood and adolescence. It helps in the proper maturation of the skeletal system.

Evaluate the options given: Analyze each option in the context of thyroxine's known effects. The option 'Promotes bone growth and development' aligns with thyroxine's role in enhancing osteoblast activity and supporting skeletal development.

Conclude with the correct action: Based on the understanding of thyroxine's function, the primary action of thyroxine on the skeletal system is to promote bone growth and development, supporting the overall health and strength of bones.