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 is an example of a positive feedback loop in animals?

Control of blood pressure by baroreceptors

The release of oxytocin during childbirth to intensify uterine contractions

Thermoregulation to maintain body temperature

Regulation of blood glucose by insulin

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Verified step by step guidance

Step 1: Understand the concept of feedback loops. Feedback loops are mechanisms that regulate physiological processes in the body. Positive feedback amplifies a response, while negative feedback reduces or counteracts a response to maintain homeostasis.

Step 2: Analyze the examples provided in the question. Positive feedback loops are characterized by a process that intensifies or accelerates a physiological response. Negative feedback loops, on the other hand, work to stabilize and return the system to its baseline state.

Step 3: Examine the example of oxytocin release during childbirth. During labor, the release of oxytocin stimulates uterine contractions. These contractions, in turn, cause the release of more oxytocin, intensifying the contractions further. This is a classic example of a positive feedback loop.

Step 4: Compare the other examples provided. Control of blood pressure by baroreceptors, thermoregulation, and regulation of blood glucose by insulin are all examples of negative feedback loops because they work to restore balance and maintain homeostasis.

Step 5: Conclude that the release of oxytocin during childbirth is the correct example of a positive feedback loop, as it amplifies the physiological response rather than stabilizing it.