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

1. Introduction to Anatomy & Physiology

Feedback Loops: Negative Feedback

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Feedback Loops: Negative Feedback

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Multiple Choice

Which of the following best describes negative feedback regulation?

A process that maintains a constant internal environment by ignoring external changes

A process in which a change in a variable triggers mechanisms that reverse the direction of that change

A process in which a change in a variable amplifies the direction of that change

A process that only occurs during disease states

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Verified step by step guidance

Understand the concept of negative feedback regulation: Negative feedback is a homeostatic mechanism where a change in a physiological variable triggers a response that counteracts or reverses the initial change, helping to maintain stability in the internal environment.

Analyze the first option: 'A process that maintains a constant internal environment by ignoring external changes.' This is incorrect because negative feedback does not ignore external changes; instead, it actively responds to them to maintain homeostasis.

Analyze the second option: 'A process in which a change in a variable triggers mechanisms that reverse the direction of that change.' This is correct because it accurately describes how negative feedback works to restore balance by reversing the initial change.

Analyze the third option: 'A process in which a change in a variable amplifies the direction of that change.' This describes positive feedback, not negative feedback. Positive feedback amplifies changes rather than reversing them.

Analyze the fourth option: 'A process that only occurs during disease states.' This is incorrect because negative feedback is a normal physiological process that occurs continuously to maintain homeostasis, not just during disease states.