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 situation is an example of a feedback system in the body that maintains homeostasis?

The dilation of pupils in response to light.

The production of adrenaline during a stressful event.

The increase in heart rate during exercise.

The regulation of blood glucose levels by insulin and glucagon.

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Verified step by step guidance

Understand the concept of homeostasis: Homeostasis is the body's ability to maintain a stable internal environment despite changes in external conditions.

Identify the components of a feedback system: A feedback system typically involves a sensor, a control center, and an effector. The sensor detects changes in the environment, the control center processes this information, and the effector makes adjustments to return to homeostasis.

Analyze the role of insulin and glucagon: Insulin and glucagon are hormones that regulate blood glucose levels. Insulin lowers blood glucose by facilitating its uptake into cells, while glucagon raises blood glucose by promoting the release of glucose from stored glycogen in the liver.

Recognize the feedback mechanism: When blood glucose levels rise, insulin is released to lower it, and when blood glucose levels fall, glucagon is released to raise it. This is an example of a negative feedback loop, which is a common mechanism in maintaining homeostasis.

Compare with other examples: The dilation of pupils, production of adrenaline, and increase in heart rate are responses to stimuli but do not directly involve a feedback loop that maintains a stable internal environment like the regulation of blood glucose does.