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

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Feedback Loops

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Multiple Choice

Which of the following statements is true concerning feedback mechanisms?

Negative feedback mechanisms amplify changes in the body.

Negative feedback mechanisms help maintain homeostasis by reversing changes.

Positive feedback mechanisms are more common than negative feedback mechanisms in the body.

Positive feedback mechanisms are used to maintain stable internal conditions.

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Verified step by step guidance

Begin by understanding the concept of feedback mechanisms in physiology. Feedback mechanisms are processes that help regulate and maintain the body's internal environment, known as homeostasis.

Identify the two main types of feedback mechanisms: negative feedback and positive feedback. Negative feedback mechanisms work to reverse a change in a controlled condition, bringing it back to its set point. Positive feedback mechanisms, on the other hand, amplify or increase the change, moving the condition further away from its set point.

Evaluate the statement 'Negative feedback mechanisms amplify changes in the body.' This statement is incorrect because negative feedback mechanisms actually work to counteract changes, not amplify them.

Consider the statement 'Negative feedback mechanisms help maintain homeostasis by reversing changes.' This statement is correct because negative feedback mechanisms are designed to restore balance by reversing deviations from the norm.

Analyze the statement 'Positive feedback mechanisms are more common than negative feedback mechanisms in the body.' This statement is incorrect because negative feedback mechanisms are more prevalent in maintaining homeostasis, while positive feedback mechanisms are less common and typically occur in specific situations, such as childbirth.