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

How is childbirth an example of a positive feedback loop?

The release of oxytocin decreases uterine contractions, leading to a gradual end of labor.

The release of oxytocin increases uterine contractions, which in turn stimulates more oxytocin release.

The release of oxytocin has no effect on uterine contractions during childbirth.

The release of oxytocin maintains a constant level of uterine contractions throughout labor.

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Verified step by step guidance

Understand the concept of feedback loops: Feedback loops are processes where the output of a system influences its own activity. In physiology, these can be either positive or negative.

Define positive feedback: Positive feedback amplifies or increases the response of a system. It leads to an enhancement of the original stimulus, rather than reducing it.

Identify the role of oxytocin in childbirth: Oxytocin is a hormone that plays a crucial role in childbirth by stimulating uterine contractions.

Explain the positive feedback loop in childbirth: During labor, the release of oxytocin increases uterine contractions. These contractions then stimulate the release of more oxytocin, further increasing the contractions.

Conclude the process: This cycle continues, amplifying the contractions until childbirth is complete, exemplifying a positive feedback loop where the initial stimulus (oxytocin release) is enhanced by its own effects (increased contractions).