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 parathyroid hormone is primarily responsible for which of the following functions?

Regulating blood calcium levels

Promoting water reabsorption in the kidneys

Controlling metabolic rate

Stimulating the production of insulin

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Verified step by step guidance

Step 1: Begin by identifying the primary function of the parathyroid hormone (PTH). Recall that PTH is secreted by the parathyroid glands and plays a critical role in calcium homeostasis.

Step 2: Understand the mechanism of PTH. It increases blood calcium levels by stimulating osteoclast activity in bones (breaking down bone tissue to release calcium), enhancing calcium reabsorption in the kidneys, and promoting activation of vitamin D to increase calcium absorption in the intestines.

Step 3: Compare the listed options to the known functions of PTH. The correct function should align with its role in regulating blood calcium levels.

Step 4: Eliminate options that are unrelated to calcium regulation. For example, promoting water reabsorption in the kidneys is primarily associated with antidiuretic hormone (ADH), controlling metabolic rate is linked to thyroid hormones, and stimulating insulin production is related to pancreatic beta cells.

Step 5: Conclude that the correct answer is 'Regulating blood calcium levels,' as this directly corresponds to the primary function of parathyroid hormone.