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: Negative Feedback

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Feedback Loops: Negative Feedback

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Multiple Choice

The antidiuretic hormone (ADH) feedback loop is an example of which type of feedback mechanism?

Direct stimulation

Negative feedback

Feedforward regulation

Positive feedback

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Verified step by step guidance

Understand the concept of feedback mechanisms: Feedback mechanisms are processes that help maintain homeostasis in the body by regulating physiological functions. They can be classified as negative feedback, positive feedback, or feedforward regulation.

Define negative feedback: Negative feedback occurs when a system responds to a change by initiating mechanisms that counteract or reverse the change, bringing the system back to its set point or equilibrium. This is the most common type of feedback in the body.

Relate ADH to negative feedback: The antidiuretic hormone (ADH) is released by the posterior pituitary gland in response to increased blood osmolarity or dehydration. ADH acts on the kidneys to promote water reabsorption, reducing blood osmolarity and restoring balance. Once the blood osmolarity returns to normal, ADH secretion decreases, demonstrating negative feedback.

Contrast with positive feedback: Positive feedback amplifies changes rather than reversing them. For example, during childbirth, oxytocin release increases uterine contractions, which further stimulate oxytocin release. This is not the mechanism seen with ADH.

Eliminate other options: Direct stimulation refers to immediate responses without feedback loops, and feedforward regulation anticipates changes rather than responding to them. Neither applies to the ADH feedback loop, confirming that it is an example of negative feedback.