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 Heart2h 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

10. Muscles

Origin and Insertion

Anatomy & Physiology

10. Muscles

Origin and Insertion

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Multiple Choice

When the diaphragm contracts, __________.

the diaphragm becomes dome shaped

exhalation occurs

inhalation occurs

the volume of the thoracic cavity decreases

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Verified step by step guidance

Understand the role of the diaphragm in respiration: The diaphragm is a dome-shaped muscle located at the base of the lungs. It plays a crucial role in the process of breathing.

Identify the action of the diaphragm during inhalation: When the diaphragm contracts, it moves downward and flattens, increasing the volume of the thoracic cavity.

Relate the change in thoracic cavity volume to air movement: As the volume of the thoracic cavity increases, the pressure inside decreases, creating a pressure gradient that allows air to flow into the lungs.

Differentiate between inhalation and exhalation: Inhalation is the process of taking air into the lungs, while exhalation is the process of expelling air from the lungs. The contraction of the diaphragm is associated with inhalation.

Conclude the correct answer: Based on the understanding of diaphragm contraction and its effects, the correct answer is that inhalation occurs when the diaphragm contracts.