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 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

1. Introduction to Anatomy & Physiology

Homeostasis

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Homeostasis

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Multiple Choice

Which of the following events is NOT the result of a negative feedback mechanism?

blood clotting when the lining of a blood vessel is injured

decreased urine production when the blood pressure drops

sweating to help lower elevated body temperature

an increased respiratory rate when blood pH is elevated

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Verified step by step guidance

Understand the concept of negative feedback mechanisms: Negative feedback mechanisms are processes that help maintain homeostasis by reversing a change in a controlled condition. When a change occurs, the mechanism works to bring the condition back to its normal state.

Identify the examples given in the problem: The examples provided are blood clotting when the lining of a blood vessel is injured, decreased urine production when blood pressure drops, sweating to help lower elevated body temperature, and increased respiratory rate when blood pH is elevated.

Analyze each example to determine if it is a negative feedback mechanism: Negative feedback mechanisms typically involve a response that counteracts the initial change. For instance, sweating to lower body temperature is a negative feedback because it helps cool the body down when it gets too hot.

Consider the nature of blood clotting: Blood clotting is a process that occurs when the lining of a blood vessel is injured. It involves a cascade of reactions that lead to the formation of a clot to prevent blood loss. This process is not a negative feedback mechanism because it does not reverse the initial change; instead, it amplifies the response to achieve a specific outcome.

Conclude which event is not a result of a negative feedback mechanism: Based on the analysis, blood clotting when the lining of a blood vessel is injured is not a negative feedback mechanism, as it does not work to reverse a change but rather to achieve a specific goal of stopping blood loss.