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 does the process of labor and delivery exemplify a positive feedback loop?

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

The placenta releases hormones that inhibit uterine contractions, slowing down labor.

The decrease in progesterone levels leads to a reduction in uterine contractions.

The cervix dilates due to a decrease in estrogen levels, which reduces the intensity of contractions.

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Verified step by step guidance

Begin by understanding the concept of a positive feedback loop. In physiology, a positive feedback loop is a process where the end product of an action causes more of that action to occur in a feedback loop. This amplifies the original action.

Identify the key hormone involved in labor and delivery: oxytocin. Oxytocin is crucial for stimulating uterine contractions during labor.

Examine how oxytocin functions in a positive feedback loop during labor. When uterine contractions occur, they stimulate the release of more oxytocin from the posterior pituitary gland.

Understand the effect of increased oxytocin levels. As oxytocin levels rise, they lead to stronger and more frequent uterine contractions, which further stimulate the release of oxytocin, continuing the cycle.

Recognize the outcome of this positive feedback loop. The cycle of increasing oxytocin and uterine contractions continues until delivery is achieved, exemplifying a positive feedback loop in the process of labor and delivery.