Table of contents

1. Introduction to Anatomy & Physiology5h 42m
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 Heart2h 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

26. Fluid and Electrolyte Balance, Acid Base Balance

Electrolyte Balance

Anatomy & Physiology

26. Fluid and Electrolyte Balance, Acid Base Balance

Electrolyte Balance

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Multiple Choice

Parathyroid hormone __________.

is released when aldosterone levels climb

enhances release of calcium from bone

activates osteoblasts

targets the thyroid gland

results in a lower blood calcium level

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Verified step by step guidance

Understand the role of parathyroid hormone (PTH) in the body. PTH is crucial for maintaining calcium homeostasis.

Recognize that PTH is released in response to low blood calcium levels, not aldosterone levels. Its primary function is to increase blood calcium levels.

Identify the target actions of PTH. It enhances the release of calcium from bones by stimulating osteoclasts, not osteoblasts. Osteoclasts break down bone tissue, releasing calcium into the bloodstream.

Clarify that PTH does not target the thyroid gland. Instead, it acts on bones, kidneys, and the intestines to regulate calcium levels.

Conclude that the effect of PTH is to increase blood calcium levels, not lower them. It achieves this by promoting calcium release from bones, increasing renal reabsorption of calcium, and enhancing intestinal absorption of calcium.