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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

Homeostasis

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Homeostasis

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Compare and contrast the operation of negative and positive feedback mechanisms in maintaining homeostasis. Provide two examples of variables controlled by negative feedback mechanisms and one example of a process regulated by a positive feedback mechanism.

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Activity

Label Homeostatic Control System

Multiple Choice

Which of the following is an example of a homeostatic imbalance?

Multiple Choice

Which of the following is true of positive feedback mechanisms?

Open Question

Define homeostasis.

Open Question

Calcium levels in Mr. Gallariani's blood are dropping to dangerously low levels. The hormone PTH is released and soon blood calcium levels begin to rise. Shortly after, PTH release slows. Is this an example of a positive or negative feedback mechanism? What is the initial stimulus? What is the result?

Open Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. Living organisms react to changes in their environment known as stimuli.

Open Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. Homeostasis is the condition of having a dynamic equilibrium of the internal environment.

Open Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

c. Positive feedback loops are triggered by a deviation from the set point of a regulated variable and are shut down when conditions return to the set point.

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