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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following statements about positive feedback loops is FALSE?

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

Positive feedback loops amplify the original stimulus.

Positive feedback loops typically help maintain homeostasis by reversing changes.

Positive feedback loops are less common than negative feedback loops in the body.

Previous problemNext problem

Verified step by step guidance

Step 1: Begin by understanding the concept of positive feedback loops. Positive feedback loops amplify or enhance the original stimulus, rather than reversing it. This is in contrast to negative feedback loops, which work to restore homeostasis by counteracting changes.

Step 2: Review examples of positive feedback loops in the body. One common example is the release of oxytocin during childbirth, which intensifies uterine contractions until delivery is complete. This demonstrates amplification of the original stimulus.

Step 3: Compare positive feedback loops to negative feedback loops. Negative feedback loops are more common in the body and are designed to maintain homeostasis by reversing changes, such as regulating blood glucose levels or body temperature.

Step 4: Analyze the statement 'Positive feedback loops typically help maintain homeostasis by reversing changes.' This is inconsistent with the definition of positive feedback loops, as they do not reverse changes but instead amplify them. This statement is therefore false.

Step 5: Conclude that the false statement is the one claiming positive feedback loops help maintain homeostasis by reversing changes, as this contradicts the fundamental nature of positive feedback mechanisms.