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: Positive Feedback

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Feedback Loops: Positive Feedback

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Multiple Choice

Which of the following statements about positive feedback mechanisms is NOT true?

An example of positive feedback is the release of oxytocin during childbirth.

Positive feedback amplifies changes in the system.

Positive feedback mechanisms are typically involved in processes that need to be self-limiting.

Positive feedback can lead to a rapid change in the system's state.

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Verified step by step guidance

Understand the concept of positive feedback mechanisms: Positive feedback mechanisms are processes that amplify or increase the occurrence of events. They are often involved in processes that need to be accelerated or intensified.

Identify examples of positive feedback: A common example is the release of oxytocin during childbirth, which intensifies contractions and accelerates labor.

Analyze the statement about amplification: Positive feedback amplifies changes in the system, meaning it enhances or increases the effect of the initial stimulus.

Consider the nature of positive feedback: Positive feedback is not typically self-limiting. Instead, it continues to amplify the response until an external factor intervenes or the process is completed.

Evaluate the statement about self-limiting processes: Positive feedback mechanisms are not usually involved in self-limiting processes. This characteristic is more typical of negative feedback mechanisms, which aim to maintain homeostasis by counteracting changes.