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

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

Which of the following statements about the dorsal and ventral respiratory groups is most correct?

The dorsal respiratory group primarily controls inspiration, while the ventral respiratory group is mainly active during forced breathing.

The dorsal respiratory group controls expiration, and the ventral group controls inspiration.

The ventral respiratory group is responsible for normal quiet breathing, while the dorsal group is only active during exercise.

Both the dorsal and ventral respiratory groups are inactive during normal breathing.

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Verified step by step guidance

Step 1: Begin by understanding the roles of the dorsal and ventral respiratory groups in the medulla oblongata, which are part of the brainstem and regulate breathing. The dorsal respiratory group (DRG) is primarily involved in controlling inspiration during normal quiet breathing, while the ventral respiratory group (VRG) is mainly active during forced breathing, such as during exercise or stress.

Step 2: Analyze the first statement: 'The dorsal respiratory group primarily controls inspiration, while the ventral respiratory group is mainly active during forced breathing.' This aligns with the physiological roles of the DRG and VRG, as the DRG controls the rhythmic firing of neurons for inspiration, and the VRG becomes active during forced breathing to control both inspiration and expiration.

Step 3: Evaluate the second statement: 'The dorsal respiratory group controls expiration, and the ventral group controls inspiration.' This is incorrect because the DRG is primarily responsible for inspiration, not expiration, and the VRG is involved in both inspiration and expiration during forced breathing.

Step 4: Assess the third statement: 'The ventral respiratory group is responsible for normal quiet breathing, while the dorsal group is only active during exercise.' This is incorrect because the DRG is responsible for normal quiet breathing, while the VRG is active during forced breathing, not quiet breathing.

Step 5: Examine the fourth statement: 'Both the dorsal and ventral respiratory groups are inactive during normal breathing.' This is incorrect because the DRG is active during normal quiet breathing, while the VRG is inactive unless forced breathing is required.