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

Positive feedback differs from negative feedback because:

it decreases the response to a stimulus

it amplifies the original stimulus rather than reversing it

it always maintains homeostasis

it is more common in the body than negative feedback

Previous problemNext problem

Verified step by step guidance

Understand the concept of feedback mechanisms: Feedback mechanisms are processes that help regulate physiological functions in the body. They are categorized into negative feedback and positive feedback.

Define negative feedback: Negative feedback works to reverse a change in a physiological condition, bringing the system back to its set point or maintaining homeostasis. For example, the regulation of body temperature or blood glucose levels.

Define positive feedback: Positive feedback amplifies or enhances the original stimulus, pushing the system further away from its set point. It is less common in the body and typically occurs in specific scenarios, such as childbirth (oxytocin release during labor) or blood clotting.

Compare the two mechanisms: Negative feedback is more common and works to maintain homeostasis by counteracting changes, while positive feedback amplifies changes and is not primarily focused on maintaining homeostasis.

Analyze the options provided: The correct answer is that positive feedback amplifies the original stimulus rather than reversing it, as this is the defining characteristic of positive feedback mechanisms.