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

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Feedback Loops

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Multiple Choice

Which of the following statements about feedback mechanisms is most accurate?

Negative feedback loops work to restore a system to its set point.

Positive feedback loops are more common than negative feedback loops in the body.

Negative feedback loops amplify changes in the body.

Positive feedback loops help maintain homeostasis by reversing changes.

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Verified step by step guidance

Begin by understanding the concept of feedback mechanisms in physiology. Feedback mechanisms are processes that help maintain homeostasis in the body by regulating physiological functions.

Identify the two main types of feedback mechanisms: negative feedback loops and positive feedback loops. Negative feedback loops work to counteract changes and bring the system back to its set point, while positive feedback loops amplify changes and move the system away from its set point.

Examine the statement: 'Negative feedback loops work to restore a system to its set point.' This is a key characteristic of negative feedback loops, as they are designed to stabilize physiological processes by reversing deviations from the norm.

Consider the statement: 'Positive feedback loops are more common than negative feedback loops in the body.' In reality, negative feedback loops are more prevalent because they help maintain stability and homeostasis, whereas positive feedback loops are less common and typically occur in specific situations like childbirth.

Evaluate the statement: 'Positive feedback loops help maintain homeostasis by reversing changes.' This is incorrect because positive feedback loops actually enhance or amplify changes, moving the system further from its set point, which is contrary to maintaining homeostasis.