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 is an example of a negative feedback mechanism?

Blood clotting after an injury

Regulation of blood glucose levels by insulin

Generation of nerve impulses

Release of oxytocin during childbirth

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Verified step by step guidance

Step 1: Understand the concept of negative feedback mechanisms. Negative feedback occurs when a system responds to a change by reversing or reducing the effect of that change, maintaining homeostasis. It is a self-regulating process that helps the body stay balanced.

Step 2: Analyze the examples provided in the question. Blood clotting after an injury is a positive feedback mechanism because it amplifies the response to form a clot. Similarly, the release of oxytocin during childbirth is also a positive feedback mechanism, as it increases uterine contractions.

Step 3: Examine the regulation of blood glucose levels by insulin. When blood glucose levels rise, insulin is released to lower glucose levels back to normal. This is an example of negative feedback because the system works to counteract the change and restore balance.

Step 4: Consider the generation of nerve impulses. This is not a feedback mechanism but rather a process of signal transmission in the nervous system.

Step 5: Conclude that the correct example of a negative feedback mechanism is the regulation of blood glucose levels by insulin, as it fits the definition of negative feedback by maintaining homeostasis.