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

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

All muscles cross at least one _____.

bone

joint

artery

nerve

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Verified step by step guidance

Step 1: Begin by understanding the anatomy of muscles. Muscles are responsible for movement and are attached to bones via tendons. They work by contracting and pulling on bones to create motion.

Step 2: Recognize that for muscles to create movement, they must cross a structure that allows motion. This structure is typically a joint, which is the point where two or more bones meet and allow for flexibility and movement.

Step 3: Eliminate incorrect options. While muscles interact with bones, arteries, and nerves, they do not 'cross' these structures in the context of movement. Instead, muscles cross joints to facilitate motion.

Step 4: Understand the role of joints in the musculoskeletal system. Joints act as pivot points for movement, and muscles crossing these joints enable actions such as bending, extending, and rotating.

Step 5: Conclude that the correct answer is 'joint,' as muscles must cross at least one joint to produce movement in the body.