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

The hormones thyroxine and triiodothyronine are collectively known as which of the following?

Parathyroid hormones

Pituitary hormones

Thyroid hormones

Adrenal hormones

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Verified step by step guidance

Step 1: Begin by identifying the hormones mentioned in the problem: thyroxine (T4) and triiodothyronine (T3). These are key hormones involved in regulating metabolism, growth, and development.

Step 2: Recall the gland responsible for producing these hormones. Thyroxine (T4) and triiodothyronine (T3) are secreted by the thyroid gland, located in the neck below the larynx.

Step 3: Understand the classification of hormones based on their origin. Thyroxine and triiodothyronine are collectively referred to as thyroid hormones because they are produced by the thyroid gland.

Step 4: Eliminate the incorrect options by understanding their origins: Parathyroid hormones are produced by the parathyroid glands, pituitary hormones by the pituitary gland, and adrenal hormones by the adrenal glands.

Step 5: Conclude that the correct classification for thyroxine and triiodothyronine is thyroid hormones, as they are synthesized and secreted by the thyroid gland.