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

26. Fluid and Electrolyte Balance, Acid Base Balance

Fluid Balance

Anatomy & Physiology

26. Fluid and Electrolyte Balance, Acid Base Balance

Fluid Balance

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Multiple Choice

All of the following factors would stimulate the hypothalamic thirst center EXCEPT __________.

increased angiotensin II secretion

decreased saliva production

hypotonic extracellular fluid

a decline in blood volume

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Verified step by step guidance

Understand the role of the hypothalamic thirst center: The hypothalamic thirst center is responsible for regulating thirst and fluid intake in the body. It is activated by various physiological signals indicating a need for water intake.

Identify the factors that stimulate the thirst center: Typically, the thirst center is stimulated by increased angiotensin II secretion, decreased saliva production, and a decline in blood volume. These factors indicate dehydration or a need for fluid replenishment.

Analyze the exception: The problem asks for the factor that does NOT stimulate the thirst center. Hypotonic extracellular fluid means that the fluid outside cells has a lower concentration of solutes compared to inside the cells, which usually does not trigger thirst.

Consider the physiological response to hypotonic extracellular fluid: When extracellular fluid is hypotonic, cells may absorb water, potentially leading to cellular swelling. This condition does not typically activate the thirst center, as the body does not perceive a need for additional water intake.

Conclude the analysis: Based on the understanding of how the hypothalamic thirst center is stimulated, recognize that hypotonic extracellular fluid is the exception among the given options, as it does not trigger the thirst response.